Six dead in US shooting attacks :

A US man has surrendered to police in Washington state, after a series of shootings left six people dead.
The shootings took place at various places in the north-west of the state.
A sheriff's deputy who went to investigate an incident was one of those killed; two construction workers were found shot nearby.
Following a chase along an Interstate highway, during which a motorist was killed, a man gave himself up at a sheriff's office in Mount Vernon.
Local police say the deputy sherrif went to investigate reports of a disturbance at a local residence in Skagit County, north of Seattle.
When he didn't return and failed to answer radio calls the alarm was raised.