Lakeville police say a man becomes upset after being told to leave a house party, then shoots and injures four people.Police say the man and two suspects were arrested early this morning, shortly after the shooting at about 12:20 a.m.Their ages are 21, 20 and 19.Authorities say none of the injuries appear to be life-threatening.According to police the suspect was told to leave the party.Then as he walked away, he turned and firedseveral shots into the side of the home.