The investigation into a mysterious hole in the ground found near Toronto's Rexall Centre is closed, but the public's curiosity is still running rampant -- with many wondering why no charges were laid.

According to police, while it may not be not advisable, it's also not necessarily against the law to dig a hole on private lands.

"We have no evidence at this point to justify charging them," police spokesperson Mark Pugash told CTV News Channel on Monday morning.

"Our concern was, was there any threat? There is no threat, and that's it as far as we're concerned. If the people who own the land want to take that further then I suppose that's a matter for them."

The tunnel site is located on the York University campus, southwest of the Rexall Centre.

It was discovered by an officer with the Toronto Regional Conservation Authority who was walking the land and spotted a piece of plywood that turned out to be the door to the 10-metre-long by two-metre-high underground bunker.

The TRCA is responsible for the land where the tunnel was found.

"In terms of the criminal code it is all closed, but we are not recommending that people do this. You can't just go into a park and dig a hole," Const. Victor Kwong told CP24 on Monday .

"The Toronto Region Conservation Authority has very strict rules on what you can and can't do in conservation areas, so just because the criminal aspect is done it doesn't mean that this is OK for anyone to do."

On Monday, after publicly asking for help and information related to the case, Toronto police announced they had identified those responsible for the tunnel, determined they had "personal reasons" for the project and that their motives were harmless.

They decided not to publicly identify the men, who are both in their 20s.