This is an entry from: Live blog: Gaza under attack
Details emerge of Gaza executions
22 August 2014 13:26 BST
Six of the executed collaborators were grabbed from among hundreds of worshippers leaving the city's largest mosque, by men in the uniform of Hamas's military wing, the Ezzedine al-Qassam Brigades, witnesses told AFP.
They were pushed to the ground. One of the masked men shouted: "This is the final moment of the Zionist enemy collaborators," then the gunmen sprayed them with bullets.
Earlier, another witness saw 11 people shot dead in a square near the remains of Gaza police headquarters, bombed by Israeli warplanes.
An 18th person was shot in front of bystanders in a separate incident nearby.
The Hamas-linked website Majd, said the 11 were killed after they "gave information to the Zionist enemy."