The alarm came in to SOS Alarm 05.41.

A person has fallen into the water from an inflatable boat, and has since not been able to be found.

It was the missing person's friend, who was also in the boat, who sounded the alarm.

- We do not know if the person is in the water or has taken up somewhere else, says Patrik Johansson, chief of operations at Södertörn's fire protection association.

Heard screams

Personnel from the rescue services in Gnesta and Nyköping are on site and participating in the work.

A person that SVT Nyheter Sörmland talks to on the spot says that she heard screams from the place at 05.30.