Matthew Michanowicz

By Steve Neavling

ticklethewire.com

A 52-year-old man has been charged on allegations he planted explosives next to a building in downtown Pittsburgh.

ATF agents and local police searched the home of Matthew Michanowicz, who has been charged with possessing weapons of mass destruction and possession of explosive or incendiary materials or devices.

Authorities say the man was caught on surveillance footage getting off his bike and planting a backpack next to PNC Plaza.

On Monday, authorities investigated a report of a suspicious package and found multiple explosives inside.

Police say Michanowicz admitted he was downtown but denied planing the backpack. Photos and videos show otherwise, authorities said.