Colombian President Gustavo Petro said Monday that he will declare a state of emergency over the guerrilla attacks in the northeast that have killed dozens of people and forced thousands to flee their homes.

More than 80 people were killed following the government’s failed attempts to hold peace talks with the National Liberation Army.

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.