Fire crews were battling flames at an apartment complex in northwest Oklahoma City on Tuesday. Just before 7 p.m., the Oklahoma City Fire Department was called to the area of Northwest 16th Street and North Rockwell Avenue. Fire officials said the flames began in a lower unit before making their way up to an upper unit and the attic. Several units were damaged, and the roof partially collapsed. >> Download the KOCO 5 App One person was injured, but they are expected to be OK, according to Oklahoma City fire. There were no real evacuations at the complex due to many units being under renovation. Heavy black smoke was also seen coming from the apartment complex. The cause of the fire is under investigation. Top Headlines Patrick Clancy, father of 3 slain children, completes Boston Marathon in their honor Deadly wrong-way crash sends car over barrier, plummeting 100 feet below I-40 OU student dies in single-vehicle crash a month before graduation WATCH: Sky 5 shows crews battling large flames coming from northwest Oklahoma City home Court documents reveal possible motivation behind plot to kill 2 Kansas women in Oklahoma Panhandle