Police have arrested a 23-year-old man from the Caerphilly area following a stabbing in the grounds of Caerphilly Castle.
The man has been arrested on suspicion of attempted murder and grievous bodily harm following the incident which took place on Thursday 28 May.
A 26-year-old man, also from the area, sustained stab wounds to the abdomen and is currently in a stable condition at the University Hospital of Wales in Cardiff.
Officers from Gwent Police were alerted to the incident at around 9pm on Thursday by South Wales Ambulance Service.
A 30-year-old man from the Deri area was also treated for minor wounds at the scene.
Leading the investigation, Detective Inspector Leigh Holborn said: “Following our appeal for information, we arrested a 23 year old Caerphilly man who we believe has recently sustained injuries to his ear, face and leg. We have reason to believe that these injuries could have been caused during the incident in Caerphilly Castle and he has been taken to The University Hospital Wales in police custody.
“Our team of dedicated officers investigating are now trying to determine the circumstances around this incident.
“We continue to appeal for anyone who may have witnessed any suspicious activity in this area around the time of 8pm and 8.50pm to please contact Gwent Police."
He added that there will now be an increased police presence throughout Caerphilly town and a police cordon remains in place while the investigation is ongoing.
Police are appealing for anyone with information about the incident to come forward. Members of the public can do this by calling 101 or contacting Gwent Police on social media.