The Saudi-led coalition battling Yemeni rebels said Saturday that one of its warplanes had “wrongly targeted” a funeral in the capital Sanaa, killing more than 140 people, and announced disciplinary proceedings.

The October 8 strike prompted an international outcry and strong criticism even from Saudi Arabia's closest Western allies.

“Because of non-compliance with coalition rules of engagement and procedures, and the issuing of incorrect information, a coalition aircraft wrongly targeted the location, resulting in civilian deaths and injuries,” an inquiry team found.

“Appropriate action... must be taken against those who caused the incident, and... compensation must be offered to the families of the victims.”

The strike was one of the deadliest in the coalition's nearly 19-month-old bombing campaign in support of Yemen's beleaguered government.

More than 6,700 people have been killed in the impoverished Arabian Peninsula country since the coalition first intervened, nearly two-thirds of them civilians, according to the United Nations.

Britain is to present a draft resolution to the UN Security Council next week calling for an immediate ceasefire in Yemen, after an earlier text condemning the funeral bombing was rejected by Russia as not strong enough.

The inquiry team called on coalition commanders to change their procedures to prevent any repetition of the failings that led to the strike.

“Coalition forces must immediately review their rules of engagement and update their procedures to ensure adherence in future,” the team said.

Wounded evacuated

The air raid, which targeted the funeral of the father of a senior Houthi official, also wounded at least 525 people, more than 300 of them critically.

The outcry over the number of civilian casualties prompted the coalition to announce an easing of the air blockade it has enforced since March last year to allow the evacuation of the most seriously wounded for treatment abroad.

An Omani aircraft landed in the rebel-held Yemeni capital on Saturday to evacuate 115 of the most seriously wounded, a rebel official said.

“They are the first group of wounded to be evacuated for treatment abroad,” the rebels' deputy health minister Nasser Awjali told reporters.

Oman is the only Gulf Arab state that is not part of the coalition fighting the Houthi rebels and has previously organised evacuations from Sanaa of Westerners and others who had been detained by the insurgents.

The Omani aircraft also flew home Sanaa rebel negotiators who had been stranded in the sultanate's capital Muscat since the collapse of UN-brokered peace talks in Kuwait in August because of the air blockade, an AFP photographer reported.

Human Rights Watch said that the strike on the funeral was an “apparent war crime”.

“While military personnel and civilian officials involved in the war effort were attending the ceremony, the clear presence of several hundred civilians strongly suggests that the attack was unlawfully disproportionate,” the New York-based watchdog said on Thursday.

The coalition initially denied responsibility but after condemnation from Western governments, it promised an investigation of the “regrettable and painful” event.

A letter sent to the UN Security Council last weekend “expressed the kingdom's deep regret” over the “attack”.

There was huge pressure on the coalition to publish the findings of its investigation into the raid as swiftly as possible.

The inquiry team concluded that “a party affiliated to the Yemeni presidency of the General Chief of Staff wrongly passed information that there was a gathering of armed Huthi leaders in a known location in Sanaa, and insisted that the location be targeted immediately as a legitimate military target.

“The Air Operations Centre in Yemen directed a close air support mission to target the location... without following the coalition command's precautionary measures to ensure that the location is not a civilian one that may not be targeted.”

A Saturday statement from the coalition said it accepted the inquiry team's findings and expressed “its regret at this unintentional incident and the ensuing pain for victims' families”.