Transportation officials in Chicago say they first learned about allegations that an 18-year-old operated a commuter train after the teen apparently put pictures of the unauthorized ride on his MySpace page.

Metra spokeswoman Judy Pardonnet says someone called the agency about two weeks ago to tip them off about the pictures. She says the page has since been taken down.

Pardonnet says the engineer who allegedly let the teen operate the train had been suspended. Two other engineers who allegedly allowed the same teen to enter their locomotive cabs on other routes have also been suspended.

Pardonnet says an investigative hearing is scheduled for next month.

Metra hasn't confirmed any specifics about the incidents, including on what lines they allegedly occurred.