By Dan Wing

PHILADELPHIA (CBS) — Two people were taken into custody after being spotted on the roof of a Center City Hotel with smoke bomb and camera equipment.

The man, 28-year-old Ivan Wong of Edison, N.J. was charged with Criminal Mischief and Defiant Trespass. The woman who was with him was not charged.

READ MORE: Waterford Township Schools Closed After More Than 60% Of Staff Sickened Following Luncheon

The pair were spotted on the rooftop of the Hyatt at the Bellevue on South Broad Street around 7:30 p.m. Monday. Police took them in for questioning, and Commissioner Richard Ross tells CBS 3 Eyewitness News it appears they were just trying to take photos and the gas was for added effect.

READ MORE: Giant Supermarket Chain Opening 4 New Stores In Philadelphia, Hiring 700 Employees

“This individual may be a blogger that just likes to do things with photography that’s a little bizarre. We haven’t ruled out anything, you never do, but it just appears that this is what this individual does.”

MORE NEWS: Philadelphia Officials Expected To Provide Update On Reopening Timeline Tuesday, Sources Say

Homeland Security also took part in the investigation and questioning.