Palestinian sources reported that unknown gunmen opened fire on Tuesday afternoon at the residential building in dawn town Gaza city, no injuries reported.   The sources added that the Majed Abu Shamalih, Fatah PLC member, and Yousif Issa, the director of the preventative security forces in Gaza city, both levis in the building.   Eyewitnesses stated that the group using a white car opened fire at the building and fled the scene.