Race winner Lewis Hamilton and team-mate Nico Rosberg are both under investigation following the end of the Italian Grand Prix.
The Mercedes team have been summoned to the race stewards as both cars were found to have their left rear tyre pressures below the minimum pressure guidelines set by Pirelli.
Pirelli stated that teams must start the race with tyre pressures of 19.5psi or above.
Pole sitter Lewis Hamilton was found to be 0.3psi below that threshold, whilst Nico Rosberg was 1.1 psi under.
It is not known what the resulting penalty could be if Mercedes are found guilty, it could be a post-race time penalty or an outright disqualification.
Lewis Hamilton won the race by 25.042 seconds ahead of Sebastian Vettel of Ferrari.
Nico Rosberg retired from the race two laps before the chequered flag was dropped.
Mercedes under investigation following Italian GP
