Budapest, July 26 (DPA) Lewis Hamilton in a McLaren-Mercedes claimed his first win of the 2009 season at the Hungarian Grand Prix Sunday while Red Bull's Mark Webber finished on the podium to close the gap on championship leader Jenson Button.

The defending world champion started from fourth of the grid but managed to claim a comfortable victory at the Hungaroring from Ferrari's Kimi Raikkonen and Webber.

Nico Rosberg of Williams managed fourth with Hamilton's teammate Heikki Kovalainen fifth and Toyota's Timo Glock sixth.

Championship leader Jenson Button of Brawn GP finished down in seventh place ahead of Jarno Trulli in the second Toyota.

However, the result is subject to a post-race investigation into Raikkonen over the Finn's swerving into the path of Red Bull's Vettel at the first corner.

The result sees Button continue to head the standings with now 70 points after 10 races, followed by Webber on 51.5. Vettel remains on 47 points after failing to finish, three clear of Brawn's Rubens Barrichello, who finished out of the points.

Fernando Alonso, who started the race from pole, led early on while Vettel dropped from second after struggling on the dirty part of the track and was passed by teammate Webber and also touched Raikkonen to lie seventh eventually at the end of the first lap.

Hamilton managed to overtake Webber at the end of the pit straight on lap five while Alonso, who started light on fuel, was the first to pit on lap 11 but the two-time world champion's race was ruined after he lost his front right tyre after it was not replaced correctly.