Manhunt under way after four killed and 17 injured in Alabama shooting

Police say multiple victims were caught in crossfire in nightlife area of Five Points South in Birmingham

A major manhunt is under way in Birmingham, Alabama, for those responsible for a shooting at a nightclub late on Saturday night in which four people have died and 17 were wounded.

The violence is just the latest shocking incident that highlights the epidemic of gun violence and killings that continues to plague the US and yet prompts little to no political action.