Archaeologists working on India's south-west coast believe they may have solved the mystery of the location of a major port which was key to trade between India and the Roman Empire - Muziris, in the modern-day state of Kerala.

For many years, people have been in search of the almost mythical port, known as Vanchi to locals.

Much-recorded in Roman times, Muziris was a major centre for trade between Rome and southern India - but appeared to have simply disappeared.

Now, however, an investigation by two archaeologists - KP Shajan and V Selvakumar - has placed the ancient port as having existed where the small town of Pattanam now stands, on India's south-west Malabar coast.

"It is the first time these remains have been found on this coast," Dr Sharjan told BBC World Service's Discovery programme.

"We believe it could be Muziris."