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A UN report has found that 30 children were killed and 51 injured in an Afghan air strike last month in the north-eastern province of Kunduz.

The government said after the strike on 2 April that its air force had targeted a gathering of senior Taliban figures

The investigation by the UN found six adults had also been killed in the air strike near a religious school, where an open-air ceremony was under way.

There were "credible" reports the final toll could be higher, it noted.

According to the UN report, hundreds of men and boys were attending the event in the Dasht-e Archi district when it came under rocket and heavy machine gun fire from helicopters.

The Afghan government initially said 18 senior militants planning an attack had been killed and accused the Taliban of shooting civilians.

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However, a doctor who spoke to AFP news agency at the time said "all the victims" had been "hit by pieces of bomb, shrapnel" and not gunshots, as reported by the government.