A bomb blast in the eastern Sri Lankan town of Trincomalee has killed five people and wounded two, police say.
They said the victims were all young Tamils from the area, about 250km (150 miles) north-east of Colombo.
It is the latest in a string of deadly blasts in the north and east linked to Sri Lanka's ethnic conflict. More than 40 soldiers have died in the violence.
The government blames attacks on troops on Tamil Tiger rebels. A truce between the two sides is under severe strain.
The circumstances surrounding Monday's blast in Trincomalee are not clear.
One policeman told the AFP news agency that officials were investigating whether the Tamil youths had been transporting explosives.
The recent violence is the worst since the truce was agreed four years ago, after two decades of conflict had claimed more than 64,000 lives.
The Tigers want autonomy for minority Tamils in the north and east.