Police say they have closed their investigation into a mysterious tunnel found near the Rexall Centre after investigators spoke with the two men responsible for digging it and determined that they set out to 'build a man cave" and had no criminal intent.

In a news release issued Monday morning, police said the unidentified men built the tunnel for 'personal reasons' and that investigators are "satisfied there was neither criminal intent nor any threat to the people or City of Toronto."

“People came forward saying they knew who was responsible, we did track them down and spoke to them and with their interview and the other people who knew about the tunnel or bunker we are satisfied that it is for personal use and there was never any criminal intent nor was there a danger to the public,” Const. Victor Kwong told CP24 Monday morning.

The tunnel made headlines around the world after police held a press conference to appeal for information last week.

Speaking with CP24 outside police headquarters on College Street, Kwong said it would have been “pretty hard” for the men, both in their 20s, not to know that officers were looking for them but he said they were likely concerned about potential consequences.

Kwong added that the men did not have any “formal training” that they would have drawn upon while constructing the tunnel.

“These two guys thought it would be a good idea to dig their own cave and that’s what they did,” Kwong said. “They weren’t engineers and they weren’t previous miners or anything like that. They just were able to come access some material that they put together in what has been described as a very professional manner.”

The tunnel was discovered by a conservation officer in a densely wooded area about 82 feet from a fence restricting access to the Pan American Games venue on Jan. 14. It was located 10 feet underground and measured 33 feet long, six feet and four inches high and two feet and 10 inches wide.

In a news conference held last week, Deputy Chief Mark Saunders said there was no evidence suggesting the tunnel was intended for a “nefarious” purpose but he said police needed to speak with those responsible to confirm that there was no criminal intent.

"There is no criminal offence for digging a hole and right now there is nothing that would cross this over into criminal action in any way shape or form,” Saunders said at the time.

While police say their investigation into the tunnel has concluded, the Toronto Region Conservation Authority, which is responsible for the land, could conceivably penalize the men.

“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,” Kwong told CP24. “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.”

Remember for instant breaking news follow @cp24 on Twitter.