A 15-year-old boy from the Rhymney area has been arrested in connection with an arson attack which caused around £35,000 worth of damage.
The deliberate fire caused extensive damage to a climbing frame and other play facilities in the park – with an estimated cost of £35,000.
A £1,000 reward has been offered for information about the fire which leads to a prosecution.
A Gwent Police spokeswoman said: “At the end of June, we appealed for information regarding a fire that caused damage to a children’s play area in Ystrad Mynach.
“On Thursday, July 20, we arrested a 15-year-old boy from Rhymney on suspicion of arson. He has been released under investigation.”
Anyone with information can call 101 or the independent charity Crimestoppers anonymously on 0800 555 111 quoting log number 557 20/06/17.