Formula One's governing body published e-mails between McLaren drivers on Friday that it said proved the team had made use of information leaked from title rivals Ferrari.
McLaren were stripped of their 2007 constructors' points on Thursday and fined a record $100 million after a hearing into a spying controversy. The decision effectively handed that championship to Ferrari.
However, drivers' championship leader Lewis Hamilton and McLaren team-mate Fernando Alonso, were allowed to keep their points after the FIA wrote to them offering an immunity in return for providing evidence.
The 'spy saga' began in July when a 780-page dossier of Ferrari data was found at the home of now-suspended McLaren chief designer Mike Coughlan, who has been accused of receiving it from Ferrari's Nigel Stepney.
In a 15-page document released at the Belgian Grand Prix, the International Automobile Federation (FIA) said that while Hamilton had replied that he had no information to offer, Alonso and test driver Pedro de la Rosa had both submitted "highly relevant" e-mails. On April 12, de la Rosa e-mailed Coughlan asking for details of Ferrari's braking system.
The FIA said an analysis by Italian police of telephone, SMS and e-mail contacts between Stepney and Coughlan had also been submitted by Ferrari to the meeting of its World Motor Sport Council.This, it said, strongly indicated that "the transmission of confidential Ferrari information from Stepney to Coughlan was not limited to the 780-page dossier" and far greater than had thought at an initial WMSC hearing in July.
At that first hearing, McLaren escaped punishment because of insufficient evidence that they had benefited from the information.The governing body said Italian police had subsequently found that a total of 288 SMSes and 35 telephone calls appeared to have passed between Coughlan and Stepney during the period from March 11 to July 3. The FIA found that de la Rosa had requested and received secret Ferrari information and shared it with Alonso.