Londono, 58, who goes by the nom de guerre "Timochenko," is awake and alert after being admitted to a university hospital in the city of Villavicencio in central Colombia, according to doctors at the facility.

His stroke occurred just days after the FARC -- short for the Revolutionary Armed Forces of Colombia -- declared it had finished the process of disarming, effectively dismantling Latin America's oldest armed guerrilla force after more than a half-century of civil war.

Doctors said the FARC leader admitted himself to the facility after noticing "a change in his manner of speaking"and a loss of muscle strength" -- especially in his left arm.

Doctors said they will continue to monitor his condition, without saying how long they expect him to remain hospitalized.