unarmed?

according to BBC report,

The buses, targeted at a site near the town of Habarana, 190km (120 miles) north-east of the capital Colombo, were carrying unarmed navy servicemen on leave, the military said.

 

http://www.tamilnet.com/art.html?catid=13&artid=19928
 

 

Sri Lankan Government troops collect the weapons of sailors killed in the blast Habarana. (AFP)