The latest news after officials say a U.S. drone strike targeted a vehicle in Syria believed to be transporting the masked Islamic State militant known as "Jihadi John."

4:30 p.m.

The family of an American journalist beheaded by the Islamic State fighter known as "Jihadi John" said a U.S. drone strike targeting the extremist provides little comfort.

Diane and John Foley of New Hampshire, the parents of James Foley, say in a statement released Friday that the U.S. should spend as much effort finding and rescuing hostages as it does hunting down extremists.

James Foley was abducted in Syria on Thanksgiving Day 2012 and not heard from again until a video showing his killing was posted online in August of 2014.

Mohammed Emzawi, known as Jihadi John, beheaded Foley; officials say an overnight drone strike targeted a vehicle Emzawi rode in but it's not certain if he was killed.

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3:45 p.m.

British Foreign Secretary Philip Hammond says authorities are "pursuing all avenues" to confirm that the masked Islamic State group member known as "Jihadi John" is dead.

American officials say a U.S. drone strike on Thursday targeted a vehicle in Syria believed to be transporting Mohammed Emwazi, who appeared in several Islamic State beheading videos. Emwazi had lived in Britain and was educated there for years.

Hammond, who was in Prague Friday, said at a news conference British officials believed "the strike was successful" although they could not be sure.

He added Britain works closely with the U.S. on gathering intelligence to pinpoint individuals who threaten national security.