McLaren are embroiled in a spying row following claims one of their leading staff illegally received information from arch-rivals Ferrari.
McLaren suspended a "senior member" of their design team after learning he had "personally received technical information from a Ferrari employee".
The man in question is understood to be chief designer Mike Coughlan.
McLaren said on Wednesday that no other employee had access to the information and that the team had not benefited.
Coughlan was suspended after Ferrari sacked former team manager Nigel Stepney following an internal investigation.
Ferrari believe Stepney stole parts and gave technical information to rivals.
Italian police are investigating Stepney after Ferrari filed a formal complaint with the Modena district attorney, although no charges have been brought.
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