The clashes between rival guerrilla groups have left 80 dead as Colombia braces for cutbacks in U.S. foreign aid under President Trump.

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

It is the second time in less than a year that Colombian authorities halt peace talks with the National Liberation Army, or ELN, after blaming the rebel group for recent violence in the northeastern region of Tibu.

Colombia on Wednesday reinstated arrest warrants for dozens of guerrilla commanders blamed for armed attacks that displaced 32,000 people and sparked the country's most serious security crisis in years.