Jakarta, March 3 (Xinhua) At least 12 people were wounded in a bomb explosion in Indonesia's Ambon sea port early Saturday, police officials said.

The assembled bomb was planted near the exit way of the port in Maluku province and exploded when passengers of a ship began leaving the port, said Abu Ba'us, a district police officer.

"Twelve people were wounded, two of them seriously," he said, adding the explosion occurred at around 9.00 a.m. (local time).

Further investigations are underway, Ba'us said.