Bengaluru: Sri Lanka army chief, lieutenant general Mahesh Senanayake has alleged that the suicide bombers who carried out attacks in Sri Lanka on Easter Sunday had visited Bengaluru, Kerala and Kashmir to establish their links with other terrorist groups in the states and to be trained in carrying out terrorist activities.

Mahesh Senanayake also told media that the real reason for their visit to cities is yet to be ascertained.

The National Investigation Agency had conducted several raids in Tamil Nadu and Kerala to find out whether Indians had links with the Sri Lanka blasts. Meanwhile, the NIA arrested a Palakkad native, for allegedly planning a suicide bombing in Kerala.

According to sources, Siddique had been watching videos and listening to speeches of Zahran Hashim, the mastermind behind the Easter attacks in Sri Lanka. On April 28, the NIA had conducted a raid at Siddique's house in Palakkad and Ahamed Arafat's house in Kasaragod.   

Security in the south Indian states has been tightened, owing to the probability of a terror attack in the area. The Kerala DGP had also said that the state police has been on high alert ever since the Sri Lanka blasts.

Sri Lanka saw eight serial blasts that killed hundreds of people, injuring 500 others.

Seven suicide bombers were involved in eight blasts that targeted St Anthony's Church in Colombo, St Sebastian's Church in Negombo and Zeon Church in Batticaloa when Easter Sunday masses were in progress. The explosions also struck three five-star hotels in Colombo — the Shangri-La, the Cinnamon Grand and the Kingsbury.