Police have employed an underwater vehicle, divers from the Swedish Coast Guard and rescue boats from the national sea rescue society as the search for the missing men resumed at 9am on Saturday morning.
The alarm was sounded on Friday morning that a boat with four men on board had run into trouble and was sinking.
A massive rescue operation was launched and two of the men, both in their twenties, were rescued from the water and rushed to Västerås Central hospital with hypothermia. Their injuries are not reported to be life-threatening.
The search for the remaining missing men was called off on Friday afternoon due to adverse weather conditions and poor visibility. One of the men is in his twenties, the other in his sixties.
Police hold little hope of the men being found alive.
“The only chance they have is if they managed to land on some small island and have broken in to a summer house. But then they should have been touch by now,” said Anders Helin at Västmanland police to news agency TT.
The four men, all forestry workers, were on their way to fell timber when the accident occurred at Lövudden outside of Västerås.
“The boat was partially open and in the high waves it began taking in water and sank fast. In these conditions there are few people who go out. Had it been still then they would have been OK,” said Börje Strömberg of Västmanland police.
Police confirmed that none of the men were wearing life jackets at the time of the accident.