The occupants of the vehicle were on their way back after paying obeisance at the famous Churdharshrine in Sirmaur district, police said.
The accident took place at Antarawali near Gumma when Kapil (27) lost control while negotiating a sharp curve.
The bodies were recovered while injured persons were rushed to a hospital at Nerwa and later referred to IGMC hospital at Shimla.
The condition of two of them is stated to be critical.
A case has been registered and investigations are on to ascertain the cause of the accident, police said.