Fugitive conman, drug dealer and money launderer Martin Evans has been arrested by armed police in South Africa after three years on the run.

Evans, 52, from Swansea - who was jailed for 21 years in 2006 for conspiracy to supply cocaine and fraudulent trading - was arrested in Johannesburg on Saturday.

His scams included swindling 87 investors out of £900,000 in an ostrich farm fraud in south Wales.

He will appear in court on Monday.

A spokesman for the National Crime Agency (NCA) said Evans was sought as part of Operation Zygos, which was set up to track Britain's 12 most wanted people.

He said: "We knew he had moved to South Africa. We were tracking him down."

Evans disappeared in August 2011 after failing to return from a weekend release from prison in Wiltshire.

He was arrested on Saturday night after an operation involving the NCA and Interpol, and intelligence-led surveillance operations were handled by South African Police.

Hank Cole, the NCA's head of international operations, said: "The exceptional level of collaboration and intelligence sharing with the South African Police Service led to the capture of Evans.

"This arrest shows the NCA and its partners will pursue fugitives wherever they are in the world.

"They can run but they can't hide. We have the capacity to track them down and bring them to justice."

Evans had been known to use the aliases Martin Roydon Evans, Martin Wayne Evans, Anthony Hall and Paul Kelly.

It is not the first time Evans has been on the run.

Before he was jailed in 2006, he had been hiding in Holland and Spain, where he masterminded a drugs and money laundering operation, shipping at least £3m of ecstasy and cocaine into Britain.

Evans began his criminal career in the mid 1990s after his double-glazing firm in Port Talbot failed.

He set up an ostrich-breeding business, promising profits of 70% a year, and targeting newly-retired people for investment by advertising in specialist retirement magazines.

On the day his trial was due to start in Swansea in March 2000, Evans jumped bail and sent a fax to the court saying he would not be attending.

Criminal earnings

He went on the run as the authorities searched for his assets in Jersey and the Bahamas.