Ferrari's Felipe Massa has said that the string of tyre failures in the British Grand Prix are "unacceptable".
The Brazilian was one of six drivers, including teammate Fernando Alonso, to suffer a high-speed blowout during the race at Silverstone on Sunday.
"I think what's happened today is unacceptable because we're not talking about whether tyres are better for one team, we're talking about safety," he told Sky Sports News.
"What's happened today was very dangerous for us. But we were also lucky that in all the cases the driver was able to carry on, not crash."
Massa finished sixth in the race.
