Militants threaten to behead six hostages
The US death toll since the start of the war rose to 900 when a roadside bomb killed a soldier.
The seizure of the hostages came a day after a Filipino truck driver was released in exchange for Manila's withdrawal of its 51-member troop contingent, a move criticised by Washington and other allies as encouraging more abductions. Those fears seemed to be realised with the new kidnappings.