BAGHDAD — Cars and trucks were loaded with suitcases, mattresses and passengers and lined up at checkpoints Monday to flee Mosul, a day after the 10th killing of an Iraqi Christian in the northern city so far this month.

Nobody has claimed responsibility for the attacks, but local leaders have blamed al-Qaida in Iraq, which maintains influence in the region.

The latest victim was a music store owner who was gunned down Sunday evening at work in an attack that left his teenage nephew wounded.

Farques Batool, in his 50s, had refused to join other Christians fleeing the city because he needed to care for his wife, a daughter, his mother and the family of his dead brother, his neighbor Raid Bahnam said.