Man killed in fatal crash on South Australian highway

A man has died after his car crashed into a tree on a highway east of Adelaide.

The man was driving along the Mallee Highway, just west of Peake, when he ran off the road at 8.15pm.

The driver was the only occupant of the car.

His death takes the South Australian road toll to 38 for 2015, compared to 37 for this time last year.