FNs menneskrettsombud, Navi Pillay, forteller om drap på uskyldige sivile som drepes kun fordi de har hatt en eller annen forbindelse til myndighetene i Irak.

Iraqi fighters linked to the ISIS insurgents summarily executed 17 civilians who were working for the police in Mosul, Iraq’s second-largest city, on Wednesday, said Rupert Colville, a spokesman for Ms. Pillay in Geneva. In another episode, 12 civilians believed to have been working for Iraqi security services or the police were executed in a suburb of Mosul.

Mr. Colville also noted that four women were believed to have committed suicide after being raped by insurgents or forced into marriages with them.

In Tikrit, the hometown of Saddam Hussein, which the insurgents captured on Wednesday, Ms. Pillay’s office also reported that former prisoners jailed there had returned and killed six policemen who had worked in the prison. The insurgents were also said to have seized 16 Georgians working for an Iraqi communications company.

Between Sunday and Tuesday, Ms. Pillay’s office said, about 30 civilians had died in shelling by the Iraqi Army.