The BBC's Jane Warr reports on the arrest

Noye, 51, of Bridge Cottage, Uplands Ways, Sevenoaks, Kent, was picked up in Vejer de la Frontera, near Cadiz.

Officers in Kent want to question him about the fatal stabbing of Stephen Cameron, from Swanley, in May 1996.

The BBC's Daniel Schweimler reports on extradition from Spain

Kent Police said Noye was arrested at 10.24pm (2124 GMT) on Friday in southern Spain.

A formal extradition request is being made to the Spanish Government, Detective Superintendent Nick Biddiss said.

Stephen Cameron: Stabbed to death in front of his fiancée

Noye has been sought by police since Mr Cameron, 21, was stabbed to death at a road junction on the M25 in Kent in May 1996.

Police said they wanted to talk to Noye about the murder after they linked him to a Land Rover Discovery seen nearby.

Mr Cameron was stabbed to death in front of his 17-year-old fiancée Danielle Cable.

This week Mr Cameron's parents challenged Noye to come out of hiding.

The UK Government must submit a request for extradition within a 40-day period.

The prosecution service has to convince a Spanish court it has sufficient evidence to warrant Noye's return to face trial in the UK.