(CNN) -- A top leader of a leftist guerrilla group in Colombia may have been killed during a bombing of a rebel camp, Colombian President Juan Manuel Santos said Saturday.
Several items that are believed to belong to Fabian Ramirez were discovered in the aftermath of the attack, the president said, including weapons, computers and a backpack.
"I say apparently because it is not confirmed," said Santos, adding: "Most likely, he's dead."
Ramirez is a commander in the Revolutionary Armed Forces of Colombia, known by its Spanish acronym FARC. His given name is Jose Benito Cabrera Cuevas, CNN affiliate Caracol TV reported.
He is believed to have died along with four or five other guerrillas in an early morning raid on a jungle camp near San Vicente del Caguan, located in the southern Caqueta department, the president said.
Authorities are working to identify the dead, Santos added.
The FARC leader is wanted in the United States on drug-trafficking charges.
In 2002, Ramirez claimed responsibility for the kidnapping of then-presidential candidate Ingrid Betancourt, who was later rescued.