A breeze block was thrown as two teenage boys were attacked at a skate park.

The pair, aged 15 and 16, were then punched and kicked by two other boys during the vicious assault at Horsham Park on Monday, March 1.

One of the victims suffered bruising where he had been struck by the chucked breeze block.

Police say the attackers were accompanied by an unknown male and female during the assault, which happened at about 4pm.

Just two hours later, the victims were with a group of friends near the underpass leading to New Street when the attackers from the first incident reappeared and chased them.

The 15-year-old suffered a puncture wound to his back and stomach during this second incident. He required hospital attention but was released shortly afterwards.

Police have now arrested a 17-year-old boy from Worthing on suspicion of affray and a 16-year-old boy from Croydon on suspicion of wounding with intent.

Both have been released on conditional bail until March 30, pending further investigations.

Detective Constable Colin Taylor, of the Adur, Worthing and Horsham Investigations Team, said: "We are aware of issues surrounding youth violence in the area, and we are working with partners including the local authority to provide education and enforcement.

"This includes an increase in high visibility patrols for public reassurance.

"We must be clear that this sort of behaviour will not be tolerated, and anyone caught and convicted of offences will be dealt with robustly."

Sussex Police are now working to establish the circumstances surrounding the two attacks.

Anyone with any information about either incident is being urged to report it to police online or call 101, quoting serial 1235 of 01/03.

Independent charity Crimestoppers can also be contacted anonymously on 0800 555 111 or report it online.