Police say they are investigating after the discovery of a tunnel near a venue being used for the Pan Am Games this summer.

Police tell CTV News that they are investigating who built the tunnel, and for what purpose, but believe it poses no security threat. Federal security officials likewise tell CTV News the tunnel poses no threat.

It was found near the Rexall Centre at York University.

According to police, the tunnel was found by a Toronto and Region Conservation Authority employee.

Media reports said the tunnel was roughly seven metres long, and two-and-a-half metres deep. It also included lights inside and was powered by a generator.

Police have scheduled a press conference on the find for 10 a.m. Tuesday.