Police are asking for the public's help in trying to determine who built a mysterious underground tunnel near York University in Toronto.

Deputy Chief Mark Saunders said Tuesday the tunnel is 10 meters (10 yards) long and two meters (two yards) high. He says it isn't near any infrastructure and doesn't appear to lead anywhere.

The chamber was discovered Jan. 14 in a wooded area by a conservation officer. Saunders says more than one person with some level of expertise likely built it.

Police found plywood wall supports, a generator, moisture resistant light bulbs and a sump pump. They also found a rosary with a Remembrance Day poppy nailed to a wall.

Saunders says there's nothing to suggest a criminal element.