Mumbai: Seven persons including three foreign crews were injured when a fire broke out following an explosion on board a Korean chemical freighter at Mumbai harbour on Saturday.

Two of the injured are reported to be serious, Mumbai Port Trust officials said.

"At 11.25 AM, the Korean owned 9500 DWT chemical tanker Royal Diamond 7 reported to the Mumbai port's vessel traffic system/control station that an explosion had occurred and three crew members have been injured," an MPT press statement said.

Immediately, a tug was despatched to bring the injured to shore, it said, adding besides two Koreans and one Filipino, four local workers engaged by the Marshal Island flagged tanker had received injuries in the incident.

"They were immediately rushed to nearby hospitals by ambulance of the port trust fire brigade. It is understood that the burn injuries sustained by two of the crew members are of serious nature," it said.

Immediately on receipt of information about the incident, the chairman deputed the deputy conservator and the harbor master of the port to the anchorage to personally supervise the evacuation of the injured and ensure safety in the harbour, an MPT official said.

There was an accidental fire on board the tanker last Saturday when it was berthed at New Pir Pau Pier of the MPT after which it was shifted to the 'Tanker Anchorage - One' at Mumbai harbour, the official said. MPT chairman has already sought an interim report on the incident.

"The incident occurred at the same store room where the explosion and fire took place on last Saturday. The fire was immediately brought under control and everything was back to normal on board the tanker by 1 PM," he said.