Gujarat, Jan 03 (ANI): Security has been beefed up at Porbandar and Gir Somnath coasts in Gujarat after a Pakistani fishing boat laden with explosives bound for India blew up, after the Indian coast guard tried to stop and search it. All four people on board the boat were killed in the explosion. Indian intelligence said the crew was planning "an illicit transaction" when the vessel was intercepted on New Year's Eve in the Arabian Sea, 365 km off the western coast, according to a government statement. The Indian Coast Guard chased the Pakistani boat for almost an hour and fired warning shots before it stopped. The crew hid below the deck and set the boat on fire. It was not possible to independently verify the Indian account. Authorities have stepped up vigil at Gir Somnath district, including the famous Somnath temple, along with the coastal areas. Meanwhile, security was stepped up at the Porbandar coast also. Reacting to Friday’s incident, Pakistan's foreign ministry said it was unclear whether the incident had happened at all.