A man has died after being shot with a Taser by police.
The police watchdog said officers from the Dyfed Powys force were called to an incident Llanelli in South Wales.
In a statement, the Independent Police Complaints Commission (IPCC) said: "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."
Officers were called by a member of the public who had become concerned about the welfare of the man who appeared to be injured, the IPCC added.
A spokeswoman for the force said: "Dyfed-Powys Police were called to an incident in Llanelli relating to the behaviour and welfare of a man. A man 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."
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.