Groups of young people have been throwing stones and damaging vehicles in Horsham town centre and Southwater, according to Horsham police.
In a message to parents, Sergeant Chris O’Leary has warned there has been a rise in antisocial behaviour and urged parents to know the whereabouts of their children.
The neighbourhood policing team said they have received an increase in calls relating to antisocial behaviour between 6pm and 10pm.
In Horsham town centre there have been reports of large groups of young people congregating, shouting and throwing stones and other missiles from car park roofs.
In Southwater there have been reports of youths gathering and knocking on and kicking doors, throwing stones and damaging vehicles.
Horsham police is increasing patrols in the hotspot areas and working with local councils, anti-social behaviour caseworkers and youth workers to tackle these issues.
Sergeant O’Leary said: “Large groups of youths can be intimidating and there is evidence in recent weeks that groups of youths have been connected to criminal damage, shopliftings and assaults.
“It is important that parents/guardians know the whereabouts of their children and are aware that large groups roaming the streets can often lead to anti-social behaviour and can have a negative impact on the local community.”
Police are appealing for witnesses. Anyone with information can email email@example.com or call 101.