KARACHI, Pakistan (AP) -- Gunmen entered the third-floor offices of a Christian welfare organization on Wednesday, spraying it with automatic weapons fire and killing at least six people, police said. The shooting occurred at the offices of the Institute for Peace and Justice, a Pakistani Christian charity that does work in the city. Among the dead were three Pakistani Christians and three Muslims, police said. Four others were injured, police said. (Copyright 2002 by The Associated Press. All Rights Reserved.)