Eighth Avenue in Bethlehem has been closed near Martin Towers as fire crews work at the city's tallest building.
Two alarms were struck for a fire at Martin Towers Thursday night.
Crews are going floor-by-floor searching for a fire, reports indicate.
City officials say Eighth Avenue is closed Lyons Street and Route 378 as this fire activity continues.
Stay with 69 News for more on this developing story.