Jeremy Corbyn has pledged to give the Elgin Marbles back to Greece if he became prime minister.

The Labour leader said the marbles – also known as the Parthenon sculptures – belonged to Greece and that if elected, he would open talks on returning them.

When asked whether he would consider returning the long-disputed carved figures, Mr Corbyn stressed that they were “made in Greece, and that is where they were for thousands of years until they were taken”, the country’s Ta Nea newspaper reported.

“It is very clear to me that the Parthenon sculptures belong to Greece,” he was quoted as saying.

The Elgin Marbles, made in the 5th century BC, were removed from the Parthenon temple on the Acropolis in Athens by Lord Elgin, the then Ottoman ambassador, in the early 1800s. Since 1816 they have been housed in the British Museum.

A statue of the river god Ilissos by Phidias, part of the Elgin Marbles and on display at the British Museum (AP)

Their status has long been hotly disputed. Greece, which for decades has called for their return, with several formal requests, has also in the past threatened legal action and proposed solutions such as mediation by Unesco.

Lord Elgin insisted he had permission to take the sculptures, saying he had the permission of officials of the ruling Ottoman empire, and that he was worried about their being damaged.

Opponents of their removal from London say that the move would pave the way for requests from other countries for artworks in British museums to returned.

Supporters of the Greek position argue that the Ottoman authorities were a foreign force and had no right to let the artefacts go.

Ta Nea reported: “In the exclusive interview given to Nea, Jeremy Corbyn agrees that, if elected, he will begin the return of the Parthenon sculptures to our country.”

Mr Corbyn reportedly said: “They were made in Greece and have been there for many centuries until Lord Elgin took them.

“As with anything stolen or taken from occupied or colonial possession – including artefacts looted from other countries in the past – we should be engaged in constructive talks with the Greek government about returning the sculptures.”

Mr Corbyn has long been a supporter of the marbles’ repatriation but this is the first time as party leader that he has made his intent so clear.

The UK government’s position is that the ownership of the sculptures is a matter for the trustees of the British Museum, according to a House of Commons briefing paper.

Acropolis now! A museum for the Elgin Marbles Show all 2 1 /2 Acropolis now! A museum for the Elgin Marbles Acropolis now! A museum for the Elgin Marbles That Greece can look after the marbles properly is no longer in doubt, thanks to the new Acropolis Museum. ALAMY Acropolis now! A museum for the Elgin Marbles Five sculptures in the new museum await the sixth, in London PETROS GIANNAKOURIS / AP

The British Museum website says: “The Acropolis Museum allows the Parthenon sculptures that are in Athens to be appreciated against the backdrop of ancient Greek and Athenian history. This display does not alter the trustees’ view that the sculptures are part of everyone’s shared heritage and transcend cultural boundaries. The trustees remain convinced that the current division allows different and complementary stories to be told about the surviving sculptures.”

It says the British Museum Act 1963 bans the trustees from permanently disposing of objects unless they are duplicates of others already in the collection or are “unfit to be retained ... and can be disposed of without detriment to the interests of students”.