OTTAWA -- A New Democrat member of Parliament is accusing a Conservative MP of bullying him over an alleged finger-pointing incident in the House of Commons.

Toronto-area MP Dan Harris says he saw International Trade Minister Ed Fast make a gun gesture with his hand at NDP colleague Niki Ashton after she asked a question in the Commons.

Shortly after Harris raised the finger-pointing issue as a point of order, he says B.C. Conservative MP Ron Cannan approached him on the NDP side of the House and had to be physically restrained.

Harris complained that Cannan's alleged actions were inappropriate, coming as they did from a member of Parliament.

Fast has denied having made any hand gestures toward Ashton and has demanded an apology from Harris.

Calls to Cannan's Parliament Hill office were not returned today.

Ashton says that, while she didn't see Fast do anything, she was "shocked" at what she called a "threat" to her security.