The European Union's Commissioner for Environment, Stavros Dimas, will investigate possible irregularities in the project to build Valencia's new street circuit.
Dimas said he will look into "possible irregularities of the EU's public contract rules in the bidding process," Spanish news agency EFE reports.
The investigation will come as a result of questions asked by members of Green group David Hammerstein, Raul Romeva and Monica Frassoni.
It is also reported that there could be an investigation over the noise levels reached during the race weekend.
"With the hurry, it is possible that El Consell (Valencian government) has not done its homework regarding transparency and noise," Hammerstein was quoted as saying by EFE.
"Formula One's speed excess could create serious problems to the Valencian Government to comply with European law," he added, referring to the noise levels.
The new circuit will host the European Grand Prix on 24 August this year.
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