Obama tells Cameron wants Britain in "strong European Union"

Britain's Prime Minister David Cameron holds a news conference at the end of a European Union leaders summit in Brussels October 19, 2012.

WASHINGTON (Reuters) - President Barack Obama told British Prime Minister David Cameron on Thursday that the United States "values a strong UK in a strong European Union," the White House said.

Cameron, who has faced calls from some in his own party for a referendum on whether Britain should exit the EU, postponed on Thursday a much-anticipated speech on Britain's future role in the EU because of the hostage crisis at an Algerian gas plant where Britons and Americans are believed to be among those held.

Obama and Cameron, in a telephone call, also consulted on the Algeria hostage situation, and the leaders expressed support for the French military operation against Islamist militants in Mali, the White House said.

"The prime minister set forth his thinking on UK-EU relations in light of his upcoming speech," the White House said.

(Reporting By Matt Spetalnick)