Vic girl assaulted after aiding fallen man

A Victorian teenager has been assaulted by a man she was trying to help after he feigned injury.

The 15-year-old went to help the man after he appeared to stumble on a street in Wodonga, in the state's northeast, on Monday afternoon.

The man, believed to be aged in his 50s or 60s, asked the girl to help him to his car.

When she did, he forced her into his vehicle and assaulted her, police say.

The victim escaped and raised the alarm.

She was taken to hospital and is in a stable condition.

The man is described as balding with grey hair and a large belly.