Police and the fire service are investigating after two deliberately lit fires at Hull Road playing fields in Withernsea.
The playing fields, which are home to Withernsea AFC, were attended by firefighters twice in three days following reports of small fires in the open.
Humberside Fire and Rescue Service said crews were called at 5.30pm on Friday, May 29, and again at 8.37pm on Sunday, May 31.
On both occasions, an engine from Withernsea Fire Station was sent, and crews quickly extinguished the fires, with each incident resolved within about five minutes.
Both fires have been recorded as deliberately ignited.
Daniel Bruno, a member of the Withernsea AFC committee, said the club had already cleared up after the first fire when a further incident unfolded on Sunday evening.
He said: “I was up there walking my dog last night, and there was a kid rebuilding the fire. I attempted to shoo them away, but they were still on the field when I left.
“I rang the police while I was walking the dog, and they said if it does ignite, call the fire brigade.
“Also, one of the committee members, having seen my message to them, had driven down there. By the time he got there, it was aflame.”
Mr Bruno said the fires were not large, but the incidents had caused concern because of the risk involved and the needless call-out of emergency services.
He said: “It means calling out the fire brigade, who are best used elsewhere on actual emergencies.
“And while the field is predominantly used for football, it’s used for many other events and activities.
“I am on there most days walking my dog, as are many other people. It’s really disappointing.
“The fire brigade have been great. They’ve been very reactive when it’s been reported.
“We are asking the public, if they see anything, to report it or just stay vigilant because it is a community area. It’s important to a lot of people and a lot of events.”
Mr Bruno said the fire service had suggested on Sunday evening that paper appeared to have been put into a green bin in an apparent attempt to ignite it.
He added that other committee members went to the field and some of those believed to have been involved were later identified, and that names had been passed on to the police. The offenders were thought to have been in their late teens.
Humberside Police said inquiries were ongoing following the reports of arson.
Local Neighbourhood Policing Sergeant Mick McLaughlin said: “Arson is not only a selfish act, it can also be incredibly dangerous and I would like to offer my reassurance to the local community that we remain committed to tackling such crimes.
“Families and children should be able to enjoy their local parks and green spaces without disruption. It is totally unacceptable for these areas to be damaged by individuals intent on causing harm.
“Officers are engaging with the community and carrying out lines of inquiries to establish the full circumstances of the reports received yesterday, alongside Humberside Fire and Rescue Service, to identify those responsible.
“I urge anybody with any information that could assist our inquiries or anybody with concerns around antisocial behaviour to report it to us. Even small details can help us build a clearer picture and take effective action to keep our communities safe.”
Information can be reported to police by calling the non-emergency number 101, or by dialling 999 in an emergency or if a crime is ongoing.
Alternatively, information can be reported anonymously via the independent charity Crimestoppers on 0800 555 111.
Humberside Fire and Rescue Service urged anyone with information about deliberate fire-setting to report it anonymously to FireStoppers on 0800 169 5558 or at firestoppersreport.co.uk.