A spate of fires on the same piece of heathland in the space of just a few days has prompted a police investigation.
The fires all took place at Dartford Heath between Friday and yesterday.
Six fire engines were sent to yesterday's blaze, at about 3.50pm, just off the A2 at Dartford.
Kent Fire and Rescue Service said approximately 300 square metres of grass was alight.
Police did not say how many fires were being looking into, but information about their causes was being sought.
A spokesman said: "Officers in the Dartford Community Safety Unit are reviewing several fires which have taken place on land in Dartford Heath between Friday, July 17 and Wednesday, July 22.
"Each of the fires was safely extinguished by Kent Fire and Rescue Service, and officers are working closely with partner agencies to establish the full circumstances."
"No injuries were sustained from any of the incidents and increased patrols of the area are taking place," he added.
Anyone with information on the cause of the fires should call police on 01474 366149, quoting the reference 19-1186.