Aug.5 (GMM) Reports in the Spanish press have raised suspicions about a pitstop involving the Ferrari of world champion Kimi Raikkonen during the Hungarian grand prix.

The reports, in the daily newspapers Diario AS and also the sports publication Marca, marvel at how the Finn managed to make such a quick stop to leapfrog Spain's Fernando Alonso, who had battled on track during the Hungaroring race.

'AS' said Renault is investigating how Raikkonen's refuelling was completed so quickly, given that the standard Intertechnique fuel rigs deliver petrol to the cars at a uniform rate.

"I don't know how they did it," Alonso is quoted as saying. "We will carefully study the data and see if they have something that allows them to fill up faster."