WASHINGTON (AFP) - The United States said Friday it could reopen its embassy in Havana before a high-profile summit of the Americas in April, but cautioned "serious disagreements" remain over restoring ties with Cuba.

"I do think we can get this done in time for the Summit of the Americas," top US diplomat for Latin America, Roberta Jacobson, told reporters at the end of a second round of talks with Cuban negotiators, but much depended on whether "we can get things done in time."

The summit will be held in Panama on April 10-11.