MUMBAI, Oct. 2 -- The police on Thursday arrested three men who survived an explosion on a stranded ship off the city's coast while attempting to steal copper pipes, which resulted in the death of four of their gang members. The trio had managed to flee after the explosion, suspected to have been caused by a gas leak last week. The incident occurred on September 27 onboard Al Jafzia, an unmanned Nicaragua-flagged tanker that has been stranded off the Gorai-Manori coast in Borivali West for the past four months. The police registered an FIR against seven individuals after the bodies of the four who perished in the explosion were recovered on Wednesday. The three who survived the blast were arrested on Thursday, said Sandeep Ghuge, deputy commissioner of police (Zone 11). The arrested accused were identified as Shiven Shailesh Shundul, Pratik Pandhrinath Patil, and Vijay Premnath Sanjiva. They have been remanded to police custody till October 6. The trio allegedly confessed that they had robbed copper wires and pipes from the ship twice in the past two months and sold them to scrap dealers for Rs.8 lakh. Their luck ran out on the third attempt, said Ghuge. "We are investigating whether there were more men involved in the theft and trying to identify the scrap dealers who bought the robbed material from them," said Ghuge. Three of the deceased have been identified as Vinayak Ambavane alias Vinu, Shankar and Ramchandra Nevrekar. The identity of the fourth deceased is not known yet. Their bodies have been sent for post-mortem to JJ Hospital to determine the exact cause of death. The police are also trying to determine the precise sequence of events that led to the explosion. According to the police, the gang of seven had boarded the ship using a speedboat. Out of the seven, four went into the ship's interior to cut copper pipes to steal them. The police suspect a gas leak occurred inside the ship during this time, leading to an explosion. Al Jafzia is one of the three ships seized by the Indian Coast Guard on February 6 this year for suspected smuggling of petroleum products in India's exclusive economic zone....