Toronto police are investigating after a bizarre discovery in a local schoolyard on Friday morning.

A man was discovered just before 8 a.m. impaled on a post on the grounds of Roywood Public School, near Victoria Park Avenue and York Mills Road.

When police and paramedics arrived he was alive and able to speak — but there are very few details about what happened, or about his condition.

Police suspect the man was running away from a group of people who were trying to rob him. 

Nearby residents alerted police after they heard moans coming from the schoolyard.

"I'm not sure how many people were here, if there were more than one it would be like three or five. It wasn't a big group like 15 or 20 ... but it was just running and grunting and we just knew, everybody knew, that something was just not right," resident Lynn Ludford told CBC News.

The injured man apparently climbed a small tree to try to elude his pursuers, but fell and impaled himself on a metal pole that was supporting the tree.