French driver Esteban Ocon took his first Formula One victory with Renault-owned Alpine on Sunday in a Hungarian Grand Prix that was stopped and re-started after first lap chaos.

Sebastian Vettel took second for Aston Martin with Mercedes' seven times World champion Lewis Hamilton completing the podium after starting on pole position and then having to fight back from last

Hamilton re-took the Formula One championship lead from Red Bull's Max Verstappen.

Later, Vettel lost his second-place finish after being disqualified by stewards for a fuel irregularity, a stewards' statement said.

The German, who crossed the line 1.8 seconds behind first-time race winner Esteban Ocon, did not have enough fuel left in his Aston Martin to provide a sample after the race as required by the rules.

The decision moves Lewis Hamilton up to second, handing the Mercedes driver an eight-point lead over title rival Max Verstappen, who moves up to ninth.