It's against the law to shine a bright light at an aircraft, which is why a criminal investigation has been launched into an incident Tuesday evening.  

Pilots landing an aircraft at Pearson International, saw a beam of light pointed at them, police saying it was likely from a laser pointer.

No one was injured.

Police aren't releasing any information about the flight itself.

There's a maximum penalty of $10-thousand and up to 5 years in jail for shining a bright light at a plane.