Oil leaking from a sunken cargo ship near the Mumbai harbor had spread at least 7 miles from the site Sunday, the Indian coast guard reported.
The Panamanian-flagged MT Rak Carrier sank Thursday, but there were few details released about the cause. All 30 crew members were rescued.
Navy and coast guard ships have been using chemicals to neutralize the spilled oil, which is leaking at the rate of almost two tons per hour, the Indo-Asian News Service reported.
The ship had 340 tons of diesel and oil fuel aboard, as well as 60,000 tons of coal that was bound for an Indian port in Gujarat, officials said.
Saturday, the ship's captain and chief engineer were arrested and charged with "endangering life or personal safety of others" before being released on bail, the report said.
India also declared a large area around the sinking off-limits to fishing, CNN-IBN reported.