Britain’s triple world champion Hamilton had started on pole, with Rosberg alongside on the front row at the Circuit de Catalunya.
The German passed Hamilton round the outside of turn one and the Briton was then squeezed on to the grass as he tried to regain the lead at turn three. His car skewed sideways and hit Rosberg’s, with both drivers ending up in the gravel and the safety car was deployed.
Watching Daimler chief executive Dieter Zetsche shook his head in dismay, while Hamilton threw his steering wheel out of the car. With both Mercedes drivers out of the race, Rosberg leads the Briton by 43 points after five of the 17 rounds.
Original source: Nico, Lewis take each other out in Spain