WITNESSES say it sounded like gunfire when a car left a trail of destruction, crashing into several cars and a supermarket in Melbourne's east.

Police said the 91-year-old woman lost control of her car at Wheelers Hill Shopping Centre in Jells Rd, reversing into the car behind her before crashing into an awning near the entrance of the Woolworths supermarket about 12.30pm.

A witness, who gave the name Shirin, said she heard a loud bang as the woman crashed her car into the Woolworths supermarket about 12.30pm.

Shirin told the Waverley Leader the car hit several others before crashing into the supermarket.

"We were just eating lunch when he heard what we thought were gunshots," she said.

She said the back of her car had been smashed and had been towed.

It is understood other cars have also been towed from the carpark after being sent flying across embankments in the chaos.

Police said the driver was shaken but not hurt.

They described the scene as "chaotic", but it is believed no one was injured.

A Monash Council engineer has deemed the building safe after the damage, and the SES also attended to help clean up.

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