President Barack Obama’s spokesman, Jay Carney, said Wednesday that the administration supports a cease-fire plan brokered by special envoy Kofi Annan. Syria promised to stop its fighting by the deal’s deadline, but indicated it retained the right to respond to aggression.

Carney said it was important to judge Syria by its actions, not its promises.

He said that depending on how events play out on Thursday, the administration would consult with allies on any additional measures toward Syria.