A 53-year-old man who was arrested by police investigating the murder of a teenager who disappeared in 1989 has been released.

Caroline Graham had been living in Portadown, Co Armagh, Northern Ireland, when she vanished in 1989, aged 19.

The man was being questioned on suspicion of Ms Graham's murder and possession of a firearm, police said.

He was arrested in Co Antrim this morning and was being questioned at Antrim PSNI station

On Monday officers with specially-trained dogs searched a house at Hanover Street in the mid-Ulster town where Ms Graham had lived with her boyfriend.

Officers have previously carried out several searches in the town over the years, but Ms Graham's body has not been found.

A murder inquiry was launched in August 2012 after police said they had a number of new lines of inquiry.

Earlier this week forensic scientists were asked to examine items discovered by the search dogs.