The police watchdog has launched an investigation after the death of man who was shot with a taser by officers in south Wales.
A spokeswoman for the force said the incident related to "serious concerns about the behaviour and welfare of a man" who subsequently died.
"A full investigation has commenced, and Dyfed Powys Police referred the matter to the IPCC, who will now conduct an independent investigation.
"We are fully co-operating with them. Our thoughts are with the family of the man," the force spokeswoman said.
The IPCC confirmed it was now investigating the death.
A statement from the watchdog said: "Dyfed Powys Police officers were called out by a member of the public who was concerned about the behaviour and welfare of a man who appeared to be injured.
"Officers attended and during engagement with the man, it is understood a Taser was discharged. The man became unresponsive and was subsequently pronounced dead. The IPCC has begun an independent investigation."
Two rapid response vehicles and an ambulance were called to the scene at 7.35pm on Tuesday June 14, a spokesman for the Welsh Ambulance Service said.