The ship was discovered by the Coast Guard's aircraft on Saturday and, on behalf of the Prosecution Authority, the ship was then boarded by the Coast Guard at 8 am on Sunday.
We have given instructions that they should go on board and make sure to interview the captain, says Håkan Andersson, senior prosecutor on standby at the national unit for environmental and work environment cases.
A preliminary investigation into violations of the Environmental Code has been initiated.
What we are investigating is the matter of flushing away this residue from the tire, says Andersson.
No one has been arrested, according to the Coast Guard.
Maritime surveillance is one of our most important tasks so that we have control over the ships in the Baltic Sea and around our country, says the Coast Guard's communications officer Karin Cars.
The bulk carrier Hui Yuan is registered in Panama, according to the Coast Guard. It comes from Russia and is headed to Las Palmas, Spain. The ship is 225 meters long and 32 meters wide.
This is the fourth time since March that the Coast Guard has boarded a ship. Two of them are still off the southern coast of Sweden.
