Immigration Minister Chris Alexander announced the police tip line ahead of Friday night's debate and also mentioned a proposed ban on women wearing Muslim face veils at citizenship ceremonies.
Opposition leaders denounced injecting religion into the race. One said Conservatives are "are playing with fire."
The proposed anti-niqab law is popular in the French-speaking province of Quebec and has led to an increase in Conservative support in the tight race. The debate was being held in French and is the last time candidates will square off before the Oct. 19 vote.
Prime Minister Stephen Harper's party says polygamy, early and forced marriage and female genital mutilation take place in Canada. It says there were over 200 potential cases of forced marriage in Ontario between 2010 and 2012.
"We need to stand up for our values," Alexander said. "We need to do that in citizenship ceremonies. We need to do that to protect women and girls from forced marriage and other barbaric practices."
Former Conservative Immigration Minister Jason Kenney, now the defense minister, took aim at the niqab.
"This practice of face covering reflects a misogynistic view of women which is grounded in medieval tribal culture," Kenney said. » | Rob Gillies, Associated Press | Toronto | Friday, October 2, 2015