The guerrillas ambushed and defeated a pursuing regiment of Major A.V.E.
Most of the fighting in the area occurs when guerrillas attack a Government garrison or ambush an army patrol in the heavily forested and mountainous countryside.
In the latest attack, guerrillas ambushed a bus, killing seven.
Two died on Saturday, when guerrillas ambushed a convoy east of the town of Husaybah.
Leftist guerrillas ambushed a small navy vessel today, killing eight military men and wounding seven others, Colombian officials said.
The two were returning to the capital from a weekend in the countryside when leftist guerrillas ambushed their motorcade.
In April, guerrillas ambushed a military transport near here, killing six soldiers and a lieutenant.
This month, guerrillas seeking independence for the state have ambushed two weddings, leaving more than two dozen people dead, and blown up a train.
At noon, guerrillas ambushed a company of Iraqi police commandos as it moved to secure a police station that had been looted Thursday.
On Monday, guerrillas ambushed and killed a group of six American snipers who were moving through the area on foot.