A murder investigation has been launched after a 17-year-old girl died and a woman was seriously injured.

An 18-year-old man from Newbridge has been arrested on suspicion of murder and attempted murder in connection with the incident in Cefn Fforest, near Blackwood, Caerphilly, at around 07:15 GMT, Gwent Police said.

The girl was pronounced dead at the scene while a 38-year-old woman from Cefn Fforest is currently receiving treatment in hospital.

Armed police went to a property in Wheatley Place on Thursday following reports that two people had sustained serious injuries.

Det Supt Philip O’Connell, said police were not looking for anyone else in connection with the incident following the arrest.

“We understand that reports of this nature can be concerning, and it is likely that residents will see an increased number of officers in the area while we carry out further enquires,” he said.

He appealed for anyone with information to contact them.

A Welsh Ambulance Service spokesperson said ambulances were sent to the scene at 07:23 on Thursday, as well as two air ambulance helicopters.