A Colombian soldier who was held captive for 11 years by rebels has been found alive - after a gun battle between Revolutionary Armed Forces of Colombia (FARC) rebels and the military.

The FARC killed four other soldiers they had been holding hostage on Saturday.

It is the FARC's first major attack since its former leader, Alfonso Cano, was killed by government forces earlier this month.

Al Jazeera's Tom Ackerman reports.