Two cargo ships have collided in the Baltic Sea between the Danish island of Bornholm and the southern Swedish city of Ystad, Swedish media reported on Monday, citing the Swedish Maritime Administration.
One ship was registered in Denmark, and the other was British, Sweden's public broadcaster SVT said on its website.
"One of them is upside down. We don't know exactly how it happened," SVT quoted Swedish Maritime Administration spokesperson Jonas Franzen as saying.
"The Danish ship had at least two persons on board," Franzen said.
A big rescue operation was underway, SVT said.
Swedish news agency TT cited a Swedish coastguard spokesman saying one of the vessels was 90 metres long, and the other was 55 metres.


Iran threatens painful response if US renews attacks
Ukrainian drones hit Russian port of Tuapse for the fourth time
Detained Myanmar ex-leader Suu Kyi to meet legal team this weekend
UK police charge man over stabbing attack in London