At least 45 people have been killed and up to 150 wounded by a blast in the northern Iraqi city of Arbil, Kurdistan Health Minister Jamal Abdel Hamid told Aljazeera by phone.

Four Iraqis have been injured after US helicopters bombed residential buildings in the northern Iraqi city of Arbil, Aljazeera has learned.

The US army has apologised for killing an Iraqi child even as the death toll from double bombings in Arbil, the deadliest post-war attacks in Iraq, climbed to more than 100.