The police have received no claim of responsibility from any group, he said.

There was no immediate claim of responsibility for the violence here.

There was no word on a motive for the attack or a claim of responsibility.

Experts saw no reason to doubt the claim of responsibility.

There was no immediate claim of responsibility by any group.

There was no immediate claim of responsibility for the attack.

There were no claims of responsibility for the last three attacks.

By late Saturday, there had been no claim of responsibility for the attacks.

The claim of responsibility was the second one in the attack.

But police officials said tonight that there had been no specific claim of responsibility for the bombing.