Sri Lanka's deep southern district of Hambantota was placed under a high security alert on Friday for a possible Tamil Tiger rebels' suicide attack, police said.
Upali Hewage, the chief of the police at Hambantota, 230 kms south of Colombo, said that special road blocks were placed to check all vehicles and individuals in the district after a security warning of infiltration by rebel Liberation Tigers of Tamil Eelam (LTTE) rebels.
Hewage said that security operation on Thursday night covering over 300 homes was extended to the neighboring areas of Tangalle, Tissamaharama, Angunakolapelessa and Kataragama.
He added that some 38 Tamil people have been arrested for suspected LTTE links.
By mid-day on Friday the security sections were on alert for an explosives laden truck which was thought to have entered Hambantota, which is the home district of Sri Lankan President Mahinda Rajapakse.
The president on Thursday vowed to defeat the threat posed by the LTTE while addressing a public gathering in central Sri Lanka.
"Our security forces have the will, ability and strength to defeat terrorism. Trust in them. They have proved it in the east," Rajapakse said, praising the effort by the government forces in capturing a major LTTE stronghold last week in the Eastern Province.
The fall of Vakarai, an area once under LTTE control, was the second loss for the rebels in the Eastern Province since September last year and was seen as the biggest gain for the military since the ongoing truce agreement came into force in 2002.
Meanwhile, defense officials said that at least three people were killed and four others were injured when suspected Tamil Tigers fired at a passenger bus in the northern Mannar district in the morning.
Continuation of violence despite the stalled Norwegian backed peace process in 2002 has claimed over 3,800 lives since December 2005.