The Toronto Tunnel mystery that has been boggling the minds of investigators and the public since January has been solved. The tunnel was discovered near a venue for the upcoming Pan American and Parapan American Games, and apparently the Toronto Tunnel mystery was caused by two men in their 20s.

It seems that the duo dug the bunker-like tunnel as a "man cave" to simply hang out in.

Discovered in January and first reported by CBC News last week, the tunnel was dug near York University's Keele campus and the Rexall Centre, a major tennis venue that's set to host part of this summer's Pan Am Games, as well as the high-profile Rogers Cup tournament.

The Toronto Tunnel mystery resulted in speculation about its purpose, with national security officials even being notified if in case the tunnel posed a threat to the Games. The precaution comes as Canada has been on high alert since October, after a gunman shot a soldier guarding a monument before going to the Parliament buildings in Ottawa.

Despite the Toronto Tunnel mystery causing speculations of a threat, police didn't fail to remind the public that it wasn't against the law to dig a hole. The security concerns even turned to humor later on, reported NPR.

The tunnel, 10.1 metres long,1.93 metres high and 86.4 centimetres wide, has now been filled in. According to the CBC, investigators say the two men started on the tunnel since September.

The Associated Press reported Police Constable Victor Kwong saying that the public's tips have helped authorities identify and interview the two men who were responsible for the Toronto Tunnel mystery. He added that it had posed no danger whatsoever to public safety.

A press release was issued this morning saying police received the information on the two men three days after they released images of the tunnel.

Apparently, the man who owned some of the equipment found at the tunnel saw it on television and called the police. He informed them that he had loaned it to an employee, who was a construction worker underpinning homes.

Police approached the employee and his friend afterwards, and they admitted they had been responsible for the whole Toronto Tunnel mystery. According to the pair, they built the tunnel for "personal reasons."

Police said the men appeared to have made the tunnel with no criminal intent and that they posed no threat to the public, therefore no charges have been filed. The two men were also "very apologetic" for the Toronto Tunnel mystery escapade, said police.

According to Kwong, the men were not connected to York University, Rexall Centre or the Pan Am Games. The men also didn't have engineering background or any formal training in the construction of the tunnel.

"It is simply two guys who just wanted to dig a cave," said Kwong. "That really is what our investigation has led to ... they just wanted to dig a cave to hang out."

Police said their investigation into the Toronto Tunnel mystery is now closed. They did not reveal the names, occupations, or anything of the two men.

Meanwhile, Twitter has provided the public some form of outlet to express their feelings about the abrupt conclusion to the Toronto Tunnel mystery drama.