Army Commander Lt. Gen. Shavendra Silva said there is no danger of oil spill in Sri Lanka at this time.
Sri Lanka Navy and Air Force, together with the Indian Navy Air Force, Coast Guard are currently working to douse the fire, the Army Chief said.
Twenty three were on board, 19 evacuated to other vessels, one with severe burns moved to hospital following the development yesterday.
Sri Lanka said distressed oil tanker New Diamond now at about 25 nautical miles (approx 50 km) off the shore of Sri Lanka.
The superstructure at the rear of the ship is still on fire Fire and it has not affected the ship's crude storage area, the Navy said earlier today.