ARSON is suspected after a car was set on fire on Pride Park and the flames spread to a business.
The blaze completely destroyed the Volkswagen Golf which was parked on a trailer in Victoria Way.
It then spread to the offices of car exhaust firm Milltek Sport, blackening the walls and cracking windows.
Fire crews from Nottingham Road and Ascot Drive were called to the scene at 4.15am.
A Derbyshire Fire and Rescue Service spokesman said police were asked to attend as it was believed to be "malicious ignition".
A fire investigation is ongoing with the help of police.
A spokesman for Derbyshire Police said "the flames hit the building" but said there was "no major structural damage."
No-one at Milltek has yet been available to comment.
Anyone with information should call police on 101.
