Colombia's President Juan Manuel Santos accused his predecessor Alvaro Uribe Monday of attempting to sabotage peace talks with the FARC rebel group.

It was the second time in just three days that Santos has rebuked his former boss, this time for disclosing the locations from which rebel leaders were leaving Colombia for peace talks in Cuba.

"They are sowing discord, they are planting lies and committing truly irresponsible acts, like divulging the coordinates worked out with our army to permit the departure of some guerrilla spokesmen to Havana," Santos said.

Uribe published on his Twitter account Sunday an internal army message listing the places where military operations were temporarily suspended to allow the safe passage of the rebel representatives.

Santos said the rebels were able to leave without incident, but "the mere fact of trying to sabotage and put in danger these peoples lives was an act of immense irresponsibility."

Last week, Santos criticized Uribe for spreading "black propaganda" about the peace process.

Santos served as defense minister under Uribe, who governed from 2002 and 2010 and pursued a hard line against the rebels.

After being elected president, Santos took a more conciliatory approach to the conflict and late last year launched the first peace negotiations with the FARC in a decade.

The talks are currently in recess, but are scheduled to resume later this month. Pablo Catatumbo, a member of the seven-person FARC leadership, arrived in Havana over the weekend.

The FARC is the country's largest leftist guerrilla group, and the insurgency it has waged since 1964 is the oldest in Latin America.