The provincial transit agency is investigating a top aide to Toronto Mayor Rob Ford for several alleged incidents at a commuter train station, including one involving a broken door.

David Price, Mr. Ford's director of operations and logistics, allegedly yelled at a transit employee and damaged a door at the Georgetown GO Transit station on Aug. 27, a source told The Globe.

"Our transit safety officers have taken the report and are in the process of their investigation now, gathering evidence, and they will share their evidence with Halton Region police to determine what charges, if any, would be laid," said Anne Marie Aikins, spokeswoman for Metrolinx, which operates GO Transit.

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Metrolinx transit officers are also investigating other incidents of alleged abusive behaviour dating back several months. "We're in the process of collecting witness statements," Ms. Aikins said.

A receptionist at the mayor's office said Mr. Price was not in the office on Thursday. Mr. Price did not immediately return an e-mail seeking comment.

In a testy exchange with reporters at an unrelated event Thursday afternoon, Mr. Ford repeatedly refused to answer questions about Mr. Price's conduct, saying he never addresses personnel issues.

"It's actually no one's business what happens in my office," he said.

A spokesman for Mr. Ford's office and his chief of staff refused to say if Mr. Price remains on staff.

Both Deputy Mayor Norm Kelly and councillor Denzil Minnan-Wong, a member of the mayor's executive committee, said the reports must be addressed.

"It is something that has to be looked at and reviewed," said Mr. Kelly, who indicated that he will discuss the reports with the mayor in private.

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Mr. Minnan-Wong said if the reports are true, Mr. Ford must take quick and decisive action for what he characterized as "unacceptable behaviour."

"It should be dealt with in the clearest way sending a very clear message," he said. "The mayor has to ask himself whether he wants people like that working for him."

Mr. Price was suspended for a week in the summer after it was revealed that he had made at least six phone calls to the mayor's weekly radio show before he joined his staff in April. During the calls, Mr. Price identified himself as "Dave from Georgetown," as well as other areas of the Greater Toronto Area, and took swipes at former mayor David Miller and those on the left of the political spectrum.

On May 17, the day after the website Gawker broke the story of a video that allegedly showed Mr. Ford smoking crack cocaine, Mr. Price told the mayor's then-chief of staff that he had reliable information about the location of the video, a source in the mayor's office told The Globe. The source said Mr. Price added that the drug dealers trying to sell the video for six figures may have shot someone to get it.

In April, when asked why Mr. Price, a former financial adviser and a long-time friend of the Ford family, was hired, Councillor Doug Ford told The Globe: "You can't teach loyalty."

Mr. Price's most recent divorce filings list his home address in Halton Hills, which Georgetown is a part of.

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With files from Oliver Moore and Elizabeth Church