June death toll in Iraq tops 1,000
At least 757 civilians were killed and 599 injured in Nineveh, Diyala and Salah al-Din provinces from June 5 to 22, the UN team in Iraq said.
Spokesman Rupert Colville told reporters in Geneva the figure "should be viewed very much as a minimum" and includes some verified summary executions and extra-judicial killings of civilians, police, and soldiers who had stopped fighting.
He says at least another 318 people were killed and 590 injured during the same time in Baghdad and areas in southern Iraq, many of them from at least six vehicle-borne bombs.
The deaths in the northern provinces came as troops led by the Shiite-led government in Baghdad failed to stop the advance of the Islamic State of Iraq and the Levant (Isis).
The UN's Iraq team is also trying to verify what Mr Colville called "a number of alleged human rights violations that have been taking place in Iraq" since Isis's advances in early June.
He told reporters that kidnappings of foreigners and others continue in the northern provinces and in Baghdad, including 48 Turkish citizens taken from Turkey's consulate when Isis captured Mosul, and 40 Indian nationals who had been working for an Iraqi construction company.
But he said 16 Georgians reported kidnapped 10 days ago have been released, and 44 other foreign workers abducted by Isis when they captured Al-Door have also been freed and returned safely after local tribal leaders negotiated between the Iraqi army and Isis.
"Tragically some of those who have been abducted have been subsequently found dead, and summary executions also apparently continue to take place," Mr Colville said.