A fleeing seven-year-old child was among dozens more civilians allegedly executed by the "Islamic State of Iraq and the Levant" (ISIL) in Mosul in recent weeks, the UN said Tuesday (November 29th).

Since the battle to retake the last ISIL bastion in Iraq began six weeks ago, the UN rights office has reported hundreds of alleged execution-style killings by ISIL , stressing that some of the purported atrocities have not been definitively confirmed, AFP reported.

The most recent allegations include a November 22nd killing of "a seven-year-old child who was running towards the Iraqi security forces in Aden neighbourhood in eastern Mosul", rights office spokeswoman Ravina Shamdasani told reporters in Geneva.

That shooting was part of a reported trend of ISIL gunmen spraying fire on those trying to escape the strife-torn city, according to the rights office.

The UN has also received reports about a November 11th massacre in Mosul's eastern Bakir neighbourhood that saw 12 people reportedly shot dead for "refusing to allow ISIL to install and launch rockets from the rooftops of their houses", said Shamdasani.

She added that ISIL has apparently "been installing rocket launchers and placing snipers on the rooftops of civilian houses", in multiple locations, with consequences for residents who refuse to co-operate.

In a November 25th incident, 27 civilians were reportedly shot dead in Mosul's northern Muhandiseen Park, possibly for "leaking information" to the Iraqi forces, Shamdasani said.

The rights office has said that its standard practice of verifying alleged atrocities through multiple sources has not always been possible amid the chaos in Mosul, but that its information has come from a range of reliable sources on the ground.