HOUSTON (AP) — Police say six people have been shot after an argument that began between two groups inside a Houston nightclub continued outside as they were leaving. Investigators say as members of one group were departing Club Empire in a vehicle early Sunday they shot randomly at the other group that had gathered outside. None of the injuries were considered by police to be life-threatening and the victims were hospitalized in stable condition. No other information was immediately available. Police say the investigation into the shooting is continuing.