The Colombian government has accused the Venezuelan authorities of boycotting a final declaration adopted by consensus in the summit of Unasur's foreign ministers held on Thursday in Quito to discuss the crisis between the two countries. The meeting ended with no agreement.

"We agreed on a final declaration which had been virtually adopted by all (member countries)," which included Colombia's request to establish a "mechanism for effective cooperation and monitoring" of the alleged presence of guerrillas in Venezuela, Colombian Foreign Minister Jaime Bermúdez told several radio stations on Friday, Efe reported.

However, "Venezuela changed its mind at the last minute, when all the foreign ministers had agreed on an official position," Bermúdez said.