TEHRAN, Iran — Iranian state radio reported that all 15 British sailors and marines held captive by Iran have confessed to illegally entering Iranian waters but, in an apparent softening in the dispute, said their statements would not air because of "positive changes" from Britain.

The softer tone was apparently mirrored in London, where an official said Britain has agreed to consider discussing with Iran how to avoid future disputes over contested waters in the Persian Gulf.

Britain, however, wants an unconditional release of the crew and is not "negotiating" for their freedom, said the official, who spoke on condition of anonymity because of the sensitivity of the crisis. Iran has demanded an apology from Britain as a condition for the release of the crew, who were seized March 23.

Britain contends the sailors were in Iraqi waters, however, and has said it would not apologize. It has also criticized the airing of footage of four of the sailors confessing so far, saying the statements appeared coerced and the broadcasting of captured military personnel violated international norms.

In video Sunday, the captives appeared on the state-run Arabic-language TV channel Al-Alam in separate clips, pointing at the same map of the Persian Gulf.

The first sailor, who was identified as Royal Marine Capt. Chris Air, said the Iranians supplied the group with GPS coordinates which he said were "apparently" in Iranian waters.

KIRKUK, Iraq — A suicide truck bomber targeted a police station in the oil-rich northern city of Kirkuk today, killing at least 13 people and wounding dozens, including many children from a nearby school, police said.Video by an Associated Press cameraman at the scene showed at least four wounded U.S. soldiers and one badly damaged American Humvee. The soldiers were being treated by Army medics, with one seated while having gauze bandages wound around his bloodied head.Another soldier, whose nose was bleeding, was standing and waving directions to others. A third soldier was carried away on a stretcher and a fourth was being treated on the ground with his feet elevated against shock.The attacker rammed the truck into the concrete blast barriers protecting the back of the compound, detonating his explosives, which were hidden under bags of flour, police spokesman Brig. Gen. Sarhat Qadir said.Bombings elsewhere in Iraq killed at least 11 people and wounded more than 40.