Fallujah truce shaken by heavy nightly fighting

US warplanes strafed gunmen in Fallujah and more than 100 guerrillas armed with rocket-propelled grenades pounded a lone US armoured vehicle – a sign of heavy battles ahead if troops resume a full assault on this besieged city.

With the truce in Fallujah crumbling, a top UN envoy proposed an Iraqi caretaker government in a formula that abandons a US-favoured plan.