06/14/2013 12:17 EDT | Updated 08/13/2013 05:12 EDT

Mischief charges laid after Calgary's tallest building evacuated over threats

CALGARY - A 26-year-old man is facing mischief charges after an incident earlier this week that saw Calgary's tallest office tower evacuated.

On Tuesday, witnesses at The Bow reported seeing a man wielding a knife, uttering threats and making references to terrorism.

But by the time police arrived, he had slipped past security and vanished.

Police took no chances and ordered everyone to leave the 58-storey structure by the stairs.

Later in the week, police said they had a pretty good idea of who they were looking for, saying it was someone who suffered mental health problems and was known to police.

On Thursday, officers were called to the Westin Hotel for a complaint about an unwanted guest and arrested Tyler Judin Berg.