A Colombian presidential candidate remains in intensive care after he was shot three times - twice in the head - at a campaign event in the capital, Bogotá.

Miguel Uribe Turbay, a 39-year-old senator, was attacked while addressing supporters in a park on Saturday. Police arrested a 15-year-old suspect at the scene, the attorney general's office said.

Uribe's wife, Maria Claudia Tarazona, called on the nation to pray for his survival, saying: "Miguel is currently fighting for his life. Let us ask God to guide the hands of the doctors who are treating him."

Uribe's Centro Democratico party condemned the attack, calling it a threat to "democracy and freedom in Colombia".

Footage shared online appears to show the moment when he was shot in the head mid-speech, prompting those gathered to flee in panic.

He was airlifted to the Santa Fe Foundation hospital where supporters gathered to hold a vigil.

Uribe was rushed into surgery while in a critical condition, Bogotá Mayor Carlos Fernando Galán said late on Saturday night.

The hospital said on Sunday morning that Uribe had undergone procedures to his head and left thigh, before being taken to be stabilised in intensive care.

The 15-year-old suspect was shot in the leg as police and security officers pursued him following the attack, according to local media.

He was arrested carrying a "9mm Glock-type firearm", a statement from the attorney general's office said. An investigation is under way.

Miguel Uribe Turbay: Colombia presidential candidate shot in head