 That same day, a policeman (Agent Ramón González) is shot dead after intercepting a vehicle when the two male and two female MPM guerrillas inside draw their guns and open fire on the police vehicle.In April 1973, Colonel Héctor Irabarren, head of the 3rd Army Corps' Intelligence Service, was killed when resisting a kidnap attempt by the Mariano Pojadas and Susana Lesgart platoons of the Montoneros.On 17 October 1972, a powerful bomb detonated inside the Sheraton Hotel in Buenos Aires, to the horror of nearly 700 guests, killing a Canadian woman (Lois Crozier, travel agent from West Vancouver) and gravely wounding her husband Gerry as he slept.