 Three days later, on October 16, the Cabinet under his chairmanship advised the Governor General to invoke the War Measures Act at the request of the Premier of Quebec, Robert Bourassa, and the Mayor of Montreal, Jean Drapeau.The War Measures Act gave sweeping powers of arrest and internment to the police.The provisions took effect at 4 a.m., and, shortly thereafter, hundreds of suspected FLQ members and sympathizers were rounded-up.