The Mumbai police on Saturday arrested the captain and chief engineer of merchant vessel RAK Carrier, which sank nearly 20 nautical miles off here on Thursday.

Captain Arkan Abdul Khalil and Ionescu Ion were arrested under the bailable section 336 of the Indian Penal Code for endangering life or personal safety of others. They were later given bail on a cash bond of Rs. 25,000 each, investigating officer Bharat Bhoite told The Hindu over phone.

The arrests came a day after the police registered a case of negligence against the owner and crew.

The Panama-flagged m.v. Rak, carrying more than 60,000 tonnes of coal, 291 tonnes of fuel oil and 50 tonnes of diesel, was going to Gujarat from Indonesia when it started sinking off the Mumbai coast.

Its 30-member crew was rescued by the Navy and the Coast Guard in a joint operation. The incident sparked fears of oil spill.