A "warning shot" has been fired by South Wales Police Deputy Chief Constable Matt Jukes to those intent on causing grass fires across the region.
He told ITV News that he promises to take "robust action wherever possible" on those caught setting their communities alight.
Police in Swansea are currently dealing with an ongoing incident in the city centre which happened began around 3.15pm this afternoon.
Officers say a man presented himself at Swansea Central Police Station with injuries to his arms and face and he was then taken to hospital.
Two men, aged 28 and 39, have been arrested and are in police custody.
Police officers are in attendance at several locations in connection with the incident and an investigation is continuing.
South Wales Police investigating hundreds of grass fires across south Wales have arrested a number of children.
Four youths aged between 12 and 14 were arrested in Maerdy on Sunday evening and have since been bailed pending further enquiries.
In a separate matter, an 11 year-old boy was arrested in Taff; he, and others members of a group, were taken home to their parents by officers who gave them stern advice.
Deputy Chief Constable Matt Jukes has fired a "warning shot" to those intent on causing grass fires across the region.
He has promised to take robust action wherever possible on those caught setting their communities alight.
The family of a Merthyr motorcyclist who was killed in a collision last Friday 17th April have paid tribute to him.
Stephen Richard Jessett, aged 29, from the Pant area of Merthyr died in the collision which happened on the A4059 in Aberdare at around 4.10pm.
Mr Jessett leaves behind two sisters and one brother, also many friends, all of whom will miss him tremendously said his family in a statement.
The incident happened at the roundabout to Llwydcoed. A blue and white Yamaha motorcycle struck the roundabout signage and a black VW Polo.
Anyone with information is asked to contact the South Wales Police serious collision investigation unit on 101 or Crimestoppers anonymously on 0800 555 111 quoting occurrence number 1500133515.