Marussia was cautious on Tuesday afternoon amid media reports test driver Maria de Villota is fighting for her life in hospital.
The 32-year-old Spanish female driver crashed this morning into the side of a loading ramp of a team truck whilst conducting straightline aerodynamic testing in the team’s 2012 car at Duxford airfield.
Reports have said de Villota’s head and facial injuries are life-threatening.
"A woman has sustained life threatening injuries and following treatment at the scene by paramedics, she has been taken to Addenbrookes Hospital for further care," an ambulance spokesman is quoted as saying by Bloomberg news agency.
But Marussia on Tuesday afternoon said only that de Villota is receiving the "best medical attention possible".
"Maria is conscious and medical assessments are ongoing," said the team. "The team will await the outcome of these assessments before providing further comment.
"The team’s first priority at this time is Maria and her family," Marussia added.
On Twitter, former F1 driver Nick Heidfeld said he had heard a "rumour she (de Villota) already spoke to (her) family".