Police are investigating after fire broke out in Caird Park.
Firefighters were called into action after the blaze took hold at the popular park — just a week after work began on a £32 million development at the site.
Emergency services descended after a hedge was found to be well alight in the recreation ground.
The fire was reported by a passing member of the public.
Firefighters battled to put out the fire — using a hose reel jet — as passersby watched.
Police Scotland said they were “following a positive line of inquiry”.
A spokesman added: ‘‘Police Scotland attended at Caird Park around 8.30pm on Friday in response to reports of a fire.
‘‘The incident is being treated as suspicious.’’
It is understood the cause of the blaze is unknown.
Witnesses told of seeing firefighters successfully battling against the flames in a bid to stop them from spreading.
One eyewitness said he saw two children “near the fire”.
He said: “The fire wasn’t that large in size.
“As I walked slightly closer, both kids ran off into the park whistling at me.”
A spokesman for the Scottish Fire and Rescue Service confirmed they had attended the outbreak.
He said: “We received a call from a member of the public reporting a fire at Caird Park.
“The call came in at 8.20pm and we sent one appliance from Kingsway Fire Station.
“The crew arrived at the scene at 8.33pm. A hose reel jet was used to extinguish the flames.
“The crew stood down from the scene at 9pm.”
Spades went into the ground last week at Dundee’s £32m Regional Performance Centre for Sport — which will be housed in the park.
The space will include an indoor athletics centre and the existing athletics track is to be resurfaced, with a spectator area added.
A £5m energy centre will be included in the construction project, which is expected to finish next year.
The recently resurfaced velodrome is to have a new area of hardstanding provided for competition, along with upgraded floodlighting.
The centre will also include an eight-court multi-sports hub, with spectator seating and a sports science suite.
Other facilities will include FIFA-standard indoor 3G football pitches and an outdoor artificial rugby-sized pitch.