Julio Acevedo, the man wanted by police in New York in connection with a hit-and-run accident that killed an expectant couple, told New York's Daily News he was fleeing a gunman who was trying to shoot at him.
The couple's baby was delivered prematurely after the crash on Sunday, but later died.
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A robot was sent to the scene as police closed the motorway in both directions between Northampton and Milton Keynes.
Mostly dry after a misty start in places
A police officer has suffered potentially life threatening injuries after being assaulted in Doncaster.