Jenson Button scored victory at the Bahrain Grand Prix to strengthen his grip on the world drivers' title.

His win and the fifth place scored by his team-mate Rubens Barrichello in the Mercedes-powered Brawn also further extended the Brackley-based team's lead in the constructors' title.

The Enstone-built Renault of Fernando Alonso picked up the last points-scoring place in eighth place and his team-mate Nelson Piquet finished tenth.

Nico Rosberg finished just outside the points in ninth place in the Grove-built Williams. His Williams team-mate Kazuki Nakajima was the only retirement.

Button took victory in Bahrain from Chinese GP winner Sebastian Vettel, driving for the Milton Keynes-based Red Bull team.

The final place on the podium was taken by pole-sitter Jarno Trulli in the Toyota.

Lewis Hamilton finished fourth for McLaren ahead of Barrichello; Kimi Raikkonen's Ferrari and Timo Glock's Toyota.