LONDON - Britain wants to reexamine previously abandoned options in looking at ways to end the conflict in Syria, Prime Minister David Cameron's office said on Thursday.

An official declined to elaborate when asked whether those options included reviewing the EU arms embargo on Syria, which forbids sending weapons to the rebels, or imposing a no-fly zone, but said nothing would be ruled out.

"The prime minister wants to come back and look at things that were on the table a year ago which we didn't want to do then. He wants to put them back on the table," the official said.

"We haven't ruled anything in and we haven't ruled anything out ... This is the moment to get some impetus going forward. We want to put everything on the table."

The European Union arms embargo on Syria expires on December 1.

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