Ontario County sheriff's deputies are investigating the cause of crash that about 4 a.m. when a car, driven by Gladys Sykes of Waterloo, struck a tree off state Route 21

NAPLES — Two Seneca County residents were injured this morning in a one-car accident in Naples.

Ontario County sheriff's deputies responded shortly after 4 a.m. to state Route 21 near Eelpot Road, where they found an extensively damaged car off the north shoulder of the roadway into a tree.

The driver, Gladys N. Sykes, 55, of 214 W. Main St., Waterloo, had to be extricated by members of the Naples Fire Department. Deputies said Sykes complained of head and internal injuries and a passenger, Natalie D. Rivers, 40, same address, also suffered a head injury.

They were taken by Naples and Honeoye ambulances to Mercy Flight and Life Net and flown to Strong Memorial Hospital in Rochester where Sykes was listed in guarded condition, as of 11 a.m. There was no update on Rivers' condition.

Deputies said it is believed neither was wearing a seat belt.

A portion of state Route 21 was closed between Eelpot Road and state Route 53 while deputies investigated and reconstructed the crash. The cause is still under investigation.