Iraqi authorities have opened an investigation into a mass die-off of fish in the country’s central and southern marshlands, the latest in a series of such incidents in recent years.

One possible cause for the devastation is a shortage of oxygen, triggered by low water flow, increased evaporation and rising temperatures driven by climate change, according to officials and environmental activists. Another is the use of chemicals by fishermen.

“We have received several citizens’ complaints,” said Jamal Abd Zeid, chief environmental officer for the Najaf governorate, which stretches from central to southern Iraq, adding that a technical inspection team had been set up.

He explained that the team would look into water shortages, electrical fishing, and the use by fishermen of “poisons”.

For at least five years, Iraq has endured successive droughts linked to climate change. Authorities further attribute the severe decline in river flow to the construction of dams by neighbouring Iran and Turkiye.

The destruction of Iraq’s natural environment adds another layer of suffering to a country that has already faced decades of war and political oppression.

“We need lab tests to determine the exact cause” of the fish die-off, said environmental activist Jassim al-Assadi, who suggested that agricultural pesticides could also be responsible.

Investigations into similar incidents have shown that the use of poison in fishing can lead to mass deaths.

“It is dangerous for public health, as well as for the food chain,” al-Assadi said. “Using poison today, then again in a month or two … It’s going to accumulate.”

Washington has not been clear on ‘how and through what mechanism’ sanctions would be lifted, says Tehran.

Iran has demanded that the United States clarify exactly how sanctions will be lifted if the two sides are to reach a new agreement on Tehran’s nuclear programme.

Ministry of Foreign Affairs spokesman Esmail Baghaei made the comments on Monday, days after the US submitted what it described as an “acceptable” proposal. Unverified reports claim that Iran sees the offer as a “non-starter” and is preparing to reject it.

The pair has conducted seven weeks of negotiations over the nuclear programme, with the US seeking assurances that it is peaceful, while Iran hopes to escape punishing sanctions that have battered its economy in recent years.

However, Tehran is now demanding Washington detail what it is offering, reflecting scepticism voiced earlier this year by Supreme Leader Ayatollah Ali Khamenei.

In remarks carried by the official IRNA news agency, Baghaei stressed the need for guarantees regarding the “real end of the sanctions”, including details on “how and through what mechanism” they would be removed.

“The American side has not yet provided the necessary clarity in this regard,” he said.

Baghaei also reiterated Iran’s intention to continue enriching uranium for “peaceful” purposes.

US envoy Steve Witkoff has said President Donald Trump opposes Tehran continuing any enrichment, calling it a “red line”.

A leaked United Nations report shows that Iran has ramped up production of uranium enriched to 60 percent, short of the roughly 90 percent required for atomic weapons but significantly above the 4 percent or so needed for power production.

Baghaei dismissed the report as biased, accusing unnamed Western countries of pressuring the UN to act against Iran’s interests.

Official sources cited by The New York Times said the recent US proposal includes a call for Iran to end all enrichment.

While Tehran has confirmed receipt of the proposal, which the White House described as being in Iran’s “best interest”, it has said it is still reviewing the document.

“Receiving a text certainly does not mean accepting it, nor does it even mean that it is acceptable,” Baghaei said.

The Reuters news agency quoted an unnamed Iranian diplomat as saying that Tehran is in the process of “drafting a negative response to the US proposal, which could be interpreted as a rejection”.

The official described the proposal as a “non-starter” because it does not soften the US’s stance on enrichment or offer a “clear explanation” of sanctions relief, according to the report.

Iran has held five rounds of talks with the US since April 12 in search of a new agreement to replace the deal with the leading powers that Trump abandoned during his first term in 2018.

The 12-person crew, which includes climate activist Greta Thunberg, expects to take seven days to reach Gaza.

International nonprofit organisation Freedom Flotilla Coalition (FFC) says one of its vessels has left Sicily to deliver humanitarian aid to Gaza, after a previous attempt failed due to a drone attack on a different ship in the Mediterranean.

The 12-person crew, which includes Swedish climate activist Greta Thunberg, Irish actor Liam Cunningham and Franco-Palestinian MEP Rima Hassan, set sail on the Madleen from the port of Catania on Sunday, carrying barrels of relief supplies that the group called “limited amounts, though symbolic”.

The voyage comes after another vessel operated by the group, the Conscience, was hit by two drones just outside Maltese territorial waters in early May. While FFC said Israel was to blame for the incident, it has not responded to requests for comment.

“We are doing this because no matter what odds we are against, we have to keep trying, because the moment we stop trying is when we lose our humanity,” Thunberg told reporters at a news conference before the departure. The Swedish climate activist had been due to board the Conscience.

She added that “no matter how dangerous this mission is, it is nowhere near as dangerous as the silence of the entire world in the face of the lives being genocised”.

🇵🇸 ⛵️ Avec @GretaThunberg nous appelons à la mobilisation citoyenne pour soutenir massivement le navire humanitaire de @GazaFFlotilla ! C’est le seul moyen de garantir notre sécurité. 🙏 pic.twitter.com/5DUJbkRdPZ

— Rima Hassan (@RimaHas) June 1, 2025

The activists expect to take seven days to reach their destination, if they are not stopped.

The FCC, launched in 2010, is a non-violent international movement supporting Palestinians, combining humanitarian aid with political protest against the blockade on Gaza.

It said the trip “is not charity. This is a non-violent, direct action to challenge Israel’s illegal siege and escalating war crimes”.

United Nations agencies and major aid groups say Israeli restrictions, the breakdown of law and order, and widespread looting make it extremely difficult to deliver aid to Gaza’s roughly two million inhabitants.

The situation in Gaza is at its worst since the war between Israel and Hamas began 19 months ago, the UN said on Friday, despite a resumption of limited aid deliveries in the Palestinian enclave.

Under growing global pressure, Israel ended an 11-week blockade on Gaza on May 19, allowing extremely limited UN-led operations to resume.

On Monday, a new avenue for aid distribution was also launched: the Gaza Humanitarian Foundation, backed by the United States and Israel, but with the UN and international aid groups refusing to work with it, saying it is not neutral and has a distribution model that forces the displacement of Palestinians.

The FCC is the latest among a growing number of critics to accuse Israel of genocidal acts in its war in Gaza, allegations Israel vehemently denies.

“We are breaking the siege of Gaza by sea, but that’s part of a broader strategy of mobilisations that will also attempt to break the siege by land,” said activist Thiago Avila.

Avila also mentioned the upcoming Global March to Gaza – an international initiative also open to doctors, lawyers and members of the media – which is set to leave Egypt and reach the Rafah crossing in mid-June to stage a protest there, calling on Israel to stop the Gaza offensive and reopen the border.