Brian Mulroney is suing a Liberal MP for comments he made about the former prime minister's dealings with Karlheinz Schreiber.

Mulroney claims in a statement filed in Ontario Superior Court that several comments Nova Scotia MP Robert Thibault made on the Oct. 31 edition of Â鶹ӰÊÓnet's Mike Duffy Live were inaccurate and malicious.

According to Mulroney's statement of claim, Thibault said during the broadcast that Mulroney has previously claimed not to have known or had a business relationship with Schreiber, a German-Canadian businessman facing extradition to Germany for fraud charges.

The documents also allege that Thibault said Mulroney began receiving $300,000 in payments from Schreiber while he was still in office in May 1993.

Mulroney has denied the allegations, and none of them have been proven in court. He has maintained that he did not receive any money from Schreiber until after he left office.

"Mr. Thibault intended to, and did attack, Mr. Mulroney's credibility," the suit claims.

"He did so for political gain. He did so maliciously."

Thibault told Mike Duffy Live on Thursday that Mulroney's lawsuit is nothing more than an intimidation tactic.

"I don't think I said anything that's incorrect," Thibault told Duffy.

"I said what has been stated and what has been shown in print and to be fact by many media, what Karlheinz Schreiber has said, what he has said under oath."

Thibault said he hasn't seen the legal documents filed by Mulroney, but his lawyers have responded by letter to lawyers representing the former prime minister. Thibault added that he won't apologize for his comments.

Mulroney's suit seeks $2 million in damages and punitive damages. Should he win the case, Mulroney wants the money to go to health care facilities in Ontario.

In the 1990s, Mulroney won a $2.1 million settlement from the government after police documents alleged he took kickbacks for the sale of Airbus planes to Air Canada in the 1980s.