Foley killing: US tried and failed to free hostage

A US secret military mission tried but failed to free US reporter James Foley and other American hostages in Syria, US officials have said.

Their comments come after a video of Foley's beheading by Islamic State (IS) militants appeared on Tuesday.

IS said Foley's death was revenge for US air strikes on its fighters in Iraq.

US aircraft have launched fresh strikes against the militants in northern Iraq, despite IS threats to kill a second American captive in retribution for continued attacks.

Mike Wooldridge reports.