More than 80 people were killed in the country’s northeast over the weekend following the government’s failed attempts to hold peace talks with the National Liberation Army, a Colombian official said.

At least 80 people were killed in northeast Colombia following failed attempts at peace talks with the National Liberation Army, a Colombian official said.

The unusually deadly violence delivers a devastating blow to the “total peace” program of the country’s first leftist president, Gustavo Petro.