NDP Leader Thomas Mulcair has been accused of sinking to a "new low" for slamming the Conservative government after the deadly weekend rail disaster in Lac-Megantic, Quebec.

Mulcair suggested to CTV News on Saturday that Tory policies directly contributed to a "tragic" explosion that killed at least five people, with 40 still missing in the small Quebec town.

"We are seeing more and more petroleum products being transported by rail, and there are attendant dangers involved in that," he said. "And at the same time, the Conservative government is cutting transport safety in Canada, cutting back the budgets in that area."

The NDP leader said it is clear Tories are cutting in the wrong areas.

"When we have a discussion about these things in the coming months or years let’s remember this day," he said. "We are watching a magnificent little village being burned to the ground by toxic products that were being transported through it."

Former interim Liberal leader Bob Rae was quick to voice his displeasure with Mulcair’s comments with a tweet that was promptly shared hundreds of times.

Andrew MacDougall, communications director for Prime Minister Stephen Harper, also took to Twitter to lambaste Mulcair for "putting politics ahead of the people."

Mulcair’s comments also sparked discussions on Twitter with some saying they crossed the line and others suggesting it was a totally appropriate criticism from the opposition leader.

You can see a sample of some reactions in the gallery below.

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Mulcair’s remarks represented a change from the conciliatory stance he took during his visits to Calgary last week. The NDP leader suggested at the time that Alberta flood victims need help, not partisan swipes, and called on all political leaders to pull together.

"I honestly do believe the federal government is doing everything it can," he said at a pancake breakfast on Thursday. "They’ll have our full support. There are times when we will talk partisan politics. This isn’t one of them."

So, the question remains: Was Mulcair’s criticism of the Harper government after the Lac-Megantic disaster appropriate in his function as the opposition leader or in poor taste?

Tell us in the comments below.

With files from The Canadian Press

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  • Work continues at the crash site of the train derailment and fire in Lac-Megantic, Que., on Tuesday, July 16, 2013, that left 37 people confirmed dead and another 13 missing and presumed dead.

  • Work continues at the crash site of the train derailment and fire Tuesday, July 16, 2013 in Lac-Megantic, Que. that left 37 people confirmed dead and another 13 missing and presumed dead.

  • Work continues at the crash site of the train derailment and fire Tuesday, July 16, 2013 in Lac-Megantic, Que. that left 37 people confirmed dead and another 13 missing and presumed dead.

  • A fireman walks through the debris as work continues at the crash site of the train derailment and fire Tuesday, July 16, 2013 in Lac-Megantic, Que. that left 37 people confirmed dead and another 13 missing and presumed dead.

  • A levelled building is seen in the foreground the day after a train derailed causing explosions of railway cars carrying crude oil Sunday, July 7, 2013 in Lac Megantic, Que.

  • Canadian Prime Minister Harper, right, surveys the scene Sunday, July 7, 2013 in Lac Megantic, Quebec, as firefighters continue to spray derailed tanker cars. A runaway train derailed Saturday causing explosions of railway cars carrying crude oil and destroyed part of the downtown area of Lac Megantic.

  • Prime Minister Harper, centre, talks with firefighters Sunday, July 7, 2013 in Lac Megantic, Quebec. A runaway train derailed Saturday exploding tanker cars carrying crude oil and destroying part of the downtown area of Lac Megantic.

  • Prime Minister Stepen Harperwaves to people as he visits the site Sunday, July 7, 2013 in Lac Megantic, Quebec, where a runaway train derailed Saturday. Tanker cars carrying oil exploded after the derailment and destroyed the business district in Lac Megantic.

  • Firefighters keep watering railway cars the day after a train derailed causing explosions of railway cars carrying crude oil Sunday, July 7, 2013 in Lac Megantic, Que.

  • The downtown of Lac Megantic, Que. is seen Sunday, July 7, 2013, the day after a train derailed causing explosions of railway cars carrying crude oil.