Sweden mass shooting at school for adults is country's worst ever, with 11 dead including the gunman

NEW: Police chief says there is "a lot to indicate" that the gunman had shot himself.

NEW: Three women and two men, all with gunshot wounds, are in serious but stable condition.

The gunman was found dead when police reached him, a police official says.

Police raided the suspect's home after the shooting, but it wasn't immediately clear what they found.