LONDON (BNO NEWS) — An official with knowledge of the situation on Tuesday said that Somali pirates have hijacked the UK-flagged chemical tanker St. James Park in the Gulf of Aden.

The official, who’s authenticity was confirmed by BNO News, asked her name and affiliation not to be published because she was not authorized to speak on the issue.

The ship was hijacked in the Gulf of Aden on Monday at around 4.30 p.m. local time, the official said. A total of 26 crew members were on board, of mixed nationalities.

The hijacking comes on the same day that other Somali pirates released a Singapore-flagged container ship called the Kota Wajar. The ship and its 21 crew members had been held captive since the early morning of October 15 when they were hijacked about 300 nautical miles north of Seychelles.

The ship was released outside Haradere off the coast of Somalia, according to the European Union naval Force Somalia (EU NAVFOR), the force which is patrolling the waters off Somalia. “EU NAVFOR is monitoring the situation,” it said.

It was not immediately clear if any ransom was paid to secure the release of the crew members. The Canadian warship HMCS FREDERICTON from TF 508 provided medical and logistical assistance after they had been released.

At least eight ships with 218 crew members, including the St. James Park, remain hijacked in the region.