The Swedish investigators were there at the invitation of a delegation connected to the Chinese accident investigation commission.
Since it is a Chinese-flagged vessel on international waters, it is China that has jurisdiction over the vessel, says John Ahlberk, director-general of the Swedish Accident Investigation Commission.
Therefore, it is also the Chinese investigators who decide how the investigation will proceed.
The visit on board the vessel lasted for just over five hours.
We have participated in the investigations, which include both technical investigations and interviews with crew members on board. We have been able to look at what we wanted to look at, says Jonas Bäckstrand, investigation leader at the Swedish Accident Investigation Commission.
Among other things, the accident investigators have been able to look at the anchoring equipment.
Secrecy prevails
Jonas Bäckstrand cannot say anything now about the outcome of today's investigation.
We need to compile the material. It is also due to the ongoing preliminary investigations where secrecy prevails and it prevents us from releasing any information at present.
According to the Police Authority, no investigative measures were taken by Swedish police on board the vessel.
According to Denmark's Foreign Minister Lars Løkke Rasmussen (M), it will probably not take long before Yi Peng 3 leaves the Kattegat.
We expect the vessel to be able to sail further to its destination when the inspection is completed, he says to Danmarks Radio.
Suspected sabotage
A preliminary investigation is ongoing regarding sabotage due to two cable breaks in the Baltic Sea. It was initiated in November and the police authorities in Finland, Sweden, and Lithuania then established a joint investigation team (JIT) to investigate the cause of the damage to the cables.
The vessel is suspected of intentionally dragging its anchor 16 miles along the bottom of the Baltic Sea and thereby destroying the data cables, according to the Wall Street Journal.
Both Denmark's and Sweden's coastguards have been shadowing the vessel for a longer period, which has also been reported to have made mysterious maneuvers over three other underwater cables between Denmark and Sweden, before anchoring in the Kattegat south of the island of Anholt.
The fact that it has taken so long after the two cable breaks in the Baltic Sea is a disadvantage, notes John Ahlberk.
We always want to get to the scene of the incident as soon as possible after it has occurred to prevent the tracks and evidence from being lost.
He still hopes that the observations on board can provide some kind of clarity.