EDMONTON -- Mounties say "an unknown device" was detemrmined not to be an explosive after officers called a bomb squad to investigate inside a Red Deer apartment building. 

Police say officers responded to a complaint at a building at 58 Street and 58 Avenue. While inside, they found a firearm and the device. 

RCMP had cordoned off the building but say residents were allowed inside after 8 p.m.