Police are appealing for information after youths caused a fire at the Hartham play area on Sunday.
Reports say that rubbish had been taken from a bin, placed on a wooden bench in the new playground area and set on fire around 5:45pm.
The suspects are described as a group of around six or seven young people, aged between 12 and 16, who were wearing grey hoodies.
PC Sue Loughran, who is investigating, said: "This kind of senseless behaviour is extremely dangerous and could end up causing serious injury. It now means that less people are able to enjoy the park area thanks to these selfish actions and tax payers will have to foot the repair bill.
"I am appealing for anyone who may have seen this group in the area, or has information which could help us identify them, to please come forward."
Anyone with information is asked to please contact PC Loughran via email at email@example.com.
This hyperlocal news section is currently an experimental feature of Discover Hertford Online. It is an evolving service so if you have any comments or feedback you can use our forum, Twitter or the contact form.
You can also visit our news archive that features stories from 2009-2014.
Want to submit a news item?
If you have a press release you'd like to send us or you'd like us to cover a news story related to Hertford please email news.team(at)hertford.net.
If you're interested in sponsoring this news service please see our advertising options.