US surgeon general declares gun violence a public health crisis

Vivek Murthy made declaration after weekend in which dozens of Americans were killed or wounded in mass shootings

The US surgeon general on Tuesday declared gun violence a public health crisis, driven by the fast-growing number of injuries and deaths involving firearms in the country.

The advisory issued by Dr Vivek Murthy, the nation's top doctor, came as the US grappled with another summer weekend marked by mass shootings that left dozens of people dead or wounded.