Asked whether Israel had coordinated the hit on Mohammed Nimnim, a commander in the Army of Islam group, with its American ally, an army spokeswoman said.
"Without getting specifically into more details, I can tell you there is very good cooperation between us and the Americans," she said. "We have an ongoing relationship with the Americans, as well as with other forces, and from time to time we pass on information as with other sources," she said.
Nimnim, 37, was killed instantaneously when his car exploded outside a police station in Gaza City. Witness suggested the car was hit by a missile, while some media reports attributed the explosion to a planted bomb.