Eight vehicles - including an Audi RS4 and a BMW - have been broken into at a Norwich car park.
Norfolk Police said the vehicles were targeted overnight while parked at St Mary's Works, off Duke Street.
At least five cars had their windows smashed, but it is not yet known how much was stolen from inside each vehicle.
The break-ins took place at some point between 9pm on Wednesday, July 18 and 7am on Thursday, July 19.
A man, aged in his 30s and from the Norwich area, was arrested on July 19 on suspicion of theft and remains in police custody at the time of writing.
A police spokesman said the targeted cars included an Audi TT, an Audi RS4, a BMW, a Volkswagen Golf, an Audi A3 and a Ford KA.
One of the vehicle's owners said she was 'devastated' when she found out her car had been damaged.
The 26-year-old, who did not want to be named, said: 'I received an email this morning which went out to everyone who uses the car park.
'It said there had been a few cars broken into, but I didn't think I would be affected.
'I thought surely they wouldn't break into my old car because I didn't have any valuables inside it.
'But then I went out to have a look and saw the smashed window and was devastated.'
The woman said it appeared as though someone had climbed inside her car after smashing the passenger window.
She said every compartment inside the vehicle had been opened, and that someone had 'rummaged' through her paperwork.
While there was nothing valuable in the car, she did not know if anything had been stolen.
'I can't go into the car yet because I don't want to touch anything as police are meant to be coming down,' she said.
'It's annoying because they broke in for the sake of breaking in. There were no valuables in the car.'
The woman said it will cost her more than £100 to replace the window.
Norfolk Police said its officers were going to be speaking with the victims on Thursday afternoon.
It is understood that forensics also visited the car park to secure evidence.
• Anyone who witnessed the break-ins, or has information about the incident, should contact Norfolk Police on 101 and quote crime reference number 36/43986/18
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