WATCH: Cuba, US Wrestle with Embassies on Second Day of Historic Talks

HAVANA (AP) — The United States and Cuba made progress Thursday toward restoring diplomatic ties and embassies as promised by their leaders, even as key officials warned that re-establishing normal relations after more than 50 years of animosity faced a long and complicated process.

Roberta Jacobson, the top U.S. diplomat for Latin America and the most senior American official to visit the island country in more than three decades, said the second day of talks in Havana were "positive and productive," focusing on the mechanics of converting interest sections in each other's capitals into full-fledged embassies headed by ambassadors. Josefina Vidal, her Cuban counterpart, also praised the dialogue.

Both officials, however, outlined the gauntlet of traps standing in the way of a U.S.-Cuban relationship like that of any two other countries. Jacobson spoke of America's persistent human rights concerns in Cuba. Vidal cited Cuba's status on the U.S. list of state sponsors of terrorism and the various financial restrictions imposed on the country as a result of the U.S. trade embargo.

"We have to overcome more than 50 years of a relationship that was not based on confidence or trust," Jacobson told reporters. She spoke of "profound differences" still separating the two governments and said embassies by themselves wouldn't constitute normalized ties between the U.S. and Cuba, as envisioned by Presidents Barack Obama and Raul Castro when they announced their historic detente last month.

"It was a first meeting. This is a process," Vidal said. In the next weeks, she said, the U.S. and Cuba will schedule another round of talks, which may or may not be the time to finalize an agreement.

Officials from both countries described Thursday morning's session on the diplomatic ties as cordial and straightforward. Issues including ending caps on staff, limits on diplomats' movements and, in the case of the U.S. building, removing guard posts and other Cuban structures along the perimeter.

Both sides said they expected the negotiations to require more than Thursday's meeting to resolve, raising the possibility of future rounds. That could set back U.S. hopes of reopening the embassies before April's Summit of the Americas, which Obama and Castro are expected to attend.

Gustavo Machin, Cuba's deputy chief of North American Affairs, said the meeting was productive and took place "in a relaxed atmosphere of respect."

"Look at my face," he said, smiling. "It reflects the spirit in which we've been talking up 'til now."

Copyright 2015 by The Associated Press. All Rights Reserved. This material may not be published, broadcast, rewritten or redistributed. (AP Photo/Desmond Boylan) 

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