The UN Special Envoy for Yemen, Hans Grundberg, called Tuesday for accountability for all civilian deaths in Yemen following a US airstrike that killed 68 African migrants at a detention center in Saada province.

The attack on the facility holding irregular migrants also wounded 47 people, the Houthi-run Al-Masirah TV channel reported, citing civil defense officials.

“I am deeply alarmed by the airstrike on a detention facility in Saada, which reportedly resulted in dozens of casualties among detained migrants,” Grundberg said in a statement.

He added that he takes note of US statements that they are investigating the incident.

Grundberg urged all parties “to take the necessary measures to protect civilians and civilian infrastructure and ensure accountability for every loss of civilian life.”

He also pressed all actors to prioritize de-escalation, exercise restraint, and focus on efforts toward a negotiated, peaceful future for Yemen.

Separately, Al-Masirah TV reported that US forces conducted a series of evening strikes on the capital Sanaa, targeting Bani Matar, Bani Hushaysh, Al-Husn and Hamdan districts with multiple raids.

Earlier, the broadcaster said that US warplanes struck Sahar district in Saada with four airstrikes and Bart Al-Anan district in Al-Jawf Province with six raids.

Saba news agency, also affiliated with the Houthis, noted that Sanaa faced US airstrikes at dawn, including two raids on Bani Hushaysh district.

No other details were provided on possible casualties or damage from the strikes, and Washington has not released a statement.

The US has carried out more than 1,200 airstrikes in Yemen since March 15, killing more than 225 civilians and injuring over 430, mostly women and children, according to Houthi data that excludes losses among their forces.

US President Donald Trump said last month that he had ordered "decisive and powerful military action" against the Houthi group and later threatened to "completely annihilate them."

The Houthis have targeted ships passing through the Red and Arabian seas, the Bab al-Mandab Strait and the Gulf of Aden since November 2023 in solidarity with Palestinians in the Gaza Strip, where more than 52,300 people have been killed in a brutal Israeli assault for more than 19 months.

The group halted attacks when a Gaza ceasefire was declared in January between Israel and the Palestinian resistance group Hamas but resumed them after Israel renewed airstrikes on Gaza last month.