The police have initiated a criminal investigation to determine the cause of the accident, which occurred when the plane went down for landing just after 4 pm on Friday.
The Accident Investigation Authority will investigate the accident.
The Accident Investigation Authority will arrive tomorrow (Saturday), says the police's press spokesperson Ola Österling to TT.
The police announced on Friday evening that two men in their 70s and 80s, respectively, were killed in the accident. The two pilots were members of the Volunteer Air Force, which on its website writes that the deceased were very experienced pilots.
The two men were found by divers inside the airplane that was underwater, according to the rescue service.
The Volunteer Air Force states that it is one of the club's single-engine propeller planes, of the type Mooney, that crashed in connection with an exercise with other aircraft.
We received an alarm that claimed that a person had observed the plane going down into a lake, says Björn Alverfeldt, press spokesperson at the Swedish Maritime Administration, to TT.
A large effort with a rescue helicopter, ambulance helicopters, police, and divers has been ongoing at the accident site, just south of Norrtälje, during the afternoon and evening.
