Three buildings collapsed and another was damaged during a massive fire in Portsmouth, New Hampshire, Monday morning. Fire officials believe the fire started at the State Street Saloon around 12:30 a.m. before moving quickly to two separate buildings. The properties are located near Market Square, the heart of the city's downtown area, with numerous shops, restaurants and historic buildings. One firefighter suffered a shoulder injury battling the blaze. All of the residents in the affected buildings escaped unharmed, though some had to be rescued by firefighters with ladders. Forty-four communities and more than 100 firefighters helped extinguish the fire. Portsmouth Fire Chief Steve Achilles said it was the largest fire he's seen in almost 20 years as a firefighter. On Monday afternoon, some 18 hours after the fire started, crews were still working to put out hotspots as residents gathered to see the one-time Portsmouth institution, now reduced to a pile of rubble.