16-year-old killed after car strikes pedestrians in Great Southern

16-year-old girl has died in WA's Great Southern region early this morning after being struck by a car she was while walking with a group of people.

About 1.30am a vehicle travelling along Davis Road in Monjingup, about nine kilometres north of Esperance, struck the group of pedestrians.

The girl received critical injuries and was taken to the Esperance Hospital where she later died.

A 19-year-old man was assisting police with their inquiries and major crash officers were investigating if speed was a factor in the crash.

Anyone with any information relating to the crash, or who saw the crash, or a white Holden utility prior to the crash, is urged to call Crime Stoppers on 1800 333 000 or report online at www.crimestopperswa.com.au.