Dec 24 (Reuters) - The following are the top stories from selected Canadian newspapers. Reuters has not verified these stories and does not vouch for their accuracy.
* Police officers across Canada continue to grapple with Twitter users revealing the location of impaired driving checkstops, which ramp up during the holiday season. ()
* Liberal leadership contender Justin Trudeau told an Islamic conference Saturday that groups who attacked his decision to attend the gathering only work to divide Canadians. ()
Reports in the business section:
* The Canadian Federation of Independent Business wants both lower taxes and deficit reduction this holiday season. During a recent round of pre-budget consultations, the powerful business lobby urged Ottawa to stick to its current target of wiping out the deficit by 2016. ()
* A Gangnam Style parody video set in Sunnybrook Hospital's maternity ward, featuring a series of jocular delivery room scenes, was pulled from the organization's official YouTube channel after being met with criticism from a women's rights group, which has since demanded a public apology from the hospital. ()
* SNC Lavalin Group Inc is demanding that all independent consultants it does business with complete an "ethics exam" by the end of the year or risk losing their contracts with the company. ()
* Canada has increased by C$50 billion ($50.27 billion) the amount of residential mortgages that it is willing to guarantee.
But this time the Canada Mortgage and Housing Corp , the biggest provider of mortgage default insurance, is not getting any. Instead, the additional backing is going only to private-sector players such as Genworth Canada, who will see their maximum raised to $300 billion from $250 billion.