New Delhi: After a series of explosions at churches and hotels in Sri Lanka that killed 290 people and injured more than 500 on Sunday, Indian Coast Guard are on high alert along the maritime boundary.

According to sources, intelligence input suggested that those behind the deadly attack might attempt to escape from Sri Lanka and try to enter India via sea route. Preventing any attempts by terrorists to escape in India, ships and maritime surveillance aircraft Dornier have been deployed on the maritime border with Sri Lanka.

In the wake of the serial bomb blasts in Sri Lanka on Easter Sunday, Indian Coast Guard (ICG) and police have stepped security along the coastal lines to prevent any possible infiltration from Sri Lanka via sea route.

Frequency of sea patrol has been increased and a strict vigil is being kept to make sure no terrorists infiltrate in India along with the coastal areas. Security of churches has also been beefed up.

Also read: Sri Lanka blasts: Fresh explosion near Colombo church; police find 87 bomb detonators

Indian Coast Guard on Monday apprehended four Indian fishermen from the 4th islet in Rama Setu near Dhanushkodi in Rameswaram Island. They were later released after being interrogated at the Mandapam Coast Guard station.

Earlier, India has witnessed how terrorist took the sea route to carry out a serial attack in Mumbai in 2008 at the Taj hotel.

Last month, Indian Navy Chief Admiral Sunil Lanba had warned that there are reports about terrorists being trained to carry out operations through the sea. “We also have reports of terrorists being trained to carry out attacks with varying modus operandi including through the medium of the sea. India has been facing the threat of terror through the seas,” he added.