Sri Lankan military officials say at least 10 soldiers were killed and several others wounded when an army bus hit a landmine Tuesday in the northern Jaffna peninsula.
Authorities say they suspect Tamil Tiger rebels carried out the attack.
More than 30 government troops have been killed in eastern and northern Sri Lanka in a series of attacks blamed on the rebels since the beginning of this month.
The upsurge of violence comes amid threats that Tamil rebels may resume their violent struggle for an independent Tamil homeland if the government fails to agree to a peace settlement over the next 12 months.
Sri Lankan President Mahinda Rajapakshe travels to New Delhi Tuesday, for talks with Indian leaders about his efforts to reach a lasting peace in the island nation.
Some information for this report provided by AP, AFP and Reuters.