Daily Briefing: A Leaked Dossier on Sudan’s Chlorine Bombs, and Nine Killed in South Lebanon

Italian UNIFIL peacekeepers on a joint foot patrol with the Lebanese Armed Forces along the Blue Line in south Lebanon — UNIFIL peacekeepers and Lebanese Army troops patrol the Blue Line in south Lebanon — the area hit this week by Israeli strikes that killed at least nine people. Photo: UN Photo/Pasqual Gorriz.

Nexa Insight · Regional Analysis · Daily Briefing

Verified developments, 7–9 September 2026 | What happened, not what it means — the analysis is in the Weekly Update.

I · Horn of Africa

Horn of Africa today

The UN envoy was joined in Khartoum by the full Quintet of mediators, a leaked military dossier put new detail behind allegations that Sudan’s army built a secret chlorine-bomb programme, and the arms-embargo deadline is now three days away. In Juba, President Kiir cleared a legal path to December’s election.

1. Sudan / UN-Quintet diplomacy. UN envoy Pekka Haavisto was joined in Khartoum this week by envoys from the “Quintet” mechanism — the African Union, European Union, IGAD and the League of Arab States — for political consultations that ran 8–9 September. They met Transitional Sovereignty Council chairman Abdel Fattah al-Burhan and a range of political and civil figures, including Sudanese Congress Party leader Omar al-Daqir, who urged the mechanism to remain “a facilitator of the political process rather than determine its rules, agenda or participation criteria” and pressed for simultaneous tracks on ceasefire, humanitarian access and politics. — Darfur24, 9 September; allAfrica, 8 September.

2. Sudan / chemical-weapons allegation. The New York Times and The Washington Post published joint investigations, based on roughly 150 leaked files, alleging Sudan’s army built a chlorine-munitions programme from 2024, with prototype warheads holding about 33 pounds of chlorine each and roughly 300 munitions allegedly stockpiled at Merowe airport by October 2024; the reports also allege chlorine was diverted from a water-treatment plant in Omdurman and that Gen. al-Burhan ordered evidence destroyed. Sudan’s authorities reject the allegations and say they adhere to the Chemical Weapons Convention. This remains a leaked-document allegation, not an independently verified finding. — Radio Tamazuj, 8 September, citing NYT/Washington Post reporting.

3. Sudan / the arms embargo. The Darfur arms ban expires 12 September — three days away. The United States still wants it renewed and widened to cover all of Sudan and named drones; Russia and China remain opposed to a wider ban. No vote had been held as of Wednesday. — Security Council Report, September 2026 forecast.

4. South Sudan / elections. President Salva Kiir signed the Transitional Constitution (No. 13) Act, 2026 on 3 September, two days after the Transitional National Legislative Assembly approved it, formally delinking national elections from completion of a permanent constitution and census and clearing the legal path to the 22 December vote. The opposition SPLM-IO, led by suspended First Vice-President Riek Machar, has previously objected that changes to the 2018 peace agreement were made without its full participation. — Eye Radio; Radio Tamazuj; Office of the President, Republic of South Sudan.

Elsewhere in the Horn — the unverified claim of Tigrayan forces joining Fano fighters at Weldiya, reported in Issue No. 5, remains unconfirmed; no independent source has cleared it in the last 48 hours. Somalia’s AUSSOM handover and the Ethiopia–Eritrea border build-up are also unchanged.

II · Middle East

Middle East today

Israeli strikes killed at least nine people across southern Lebanon in the worst single day of fighting there in weeks. In the Gulf, the tanker war between the United States and Iran ground on with no sign of a diplomatic track.

1. Lebanon. Israeli strikes on 7 September hit Kfar Roummane and other villages in southern Lebanon, killing at least nine people — eight in a single strike on a residential building in Kfar Roummane, plus a paramedic killed in a separate strike on a vehicle — including a child and two women. Israel’s military said it was retaliating for Hezbollah drone attacks; its Foreign Ministry accused Hezbollah of “attempting to rebuild its military capabilities in southern Lebanon.” Lebanese President Joseph Aoun said the escalation endangered the US-brokered ceasefire reached in June and called for international pressure on Israel to stop the strikes. — Vatican News, 7 September; Haaretz.

2. Iran / Strait of Hormuz. The tanker war reported in Monday’s briefing continued into this week, with no confirmed new diplomatic contact between Washington and Tehran. Oil markets remain elevated on the continued risk to Gulf shipping. — Al Jazeera, ongoing coverage.

Elsewhere in the Middle East — Palestinian sources and UN Security Council briefers again reported continued ceasefire violations and aid shortfalls in Gaza this week; see Middle East Analysis Issue No. 1. No new development cleared verification in Syria or the Gulf states in the last 48 hours.

III · The Great Powers

The balance of power today

The Security Council’s Sudan deadline is now inside a week, with the United States, Russia and China still apart. In the Gulf, Washington and Tehran remain locked in a tanker war neither side shows interest in talking its way out of.

1. United States · Russia · China. With three days left before Sudan’s Darfur arms embargo expires, the Council split reported all week persists: Washington wants the ban widened to the whole country and drones named explicitly; Moscow and Beijing resist. The newly reported chemical-weapons allegation against Sudan’s army adds pressure on the Council to act, though it has not moved either side’s public position. — Security Council Report.

2. United States · Iran. The tanker war in the Gulf continues with neither government signalling a return to talks. Washington continues to rely on naval pressure rather than diplomacy to raise the cost of the war for Tehran. — Al Jazeera, ongoing coverage.

3. The middle powers · the Quintet. The African Union, European Union, IGAD and the Arab League moved together this week as a bloc in Khartoum, working alongside the UN envoy rather than through separate channels — a modest sign that regional and multilateral mediators are trying to present Sudan’s warring parties with one process rather than several competing ones. — Darfur24, 9 September.

Abdinasir Hassan Timoweyne is Chairperson of the Nexa Research and Training Centre and a political analyst specialising in the Horn of Africa and the Middle East. He lectures in International Relations at New Generation University.