Budapest, July 26 (DPA) Lewis Hamilton in a McLaren-Mercedes claimed his first win of the 2009 Formula One season at the Hungarian Grand Prix Sunday.

The defending world champion won from Ferrari's Kimi Raikkonen and Mark Webber of Red Bull. Championship leader Jenson Button finished down in seventh place in a Brawn GP.

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