World's barriers: Pakistan-Iran

The barrier has come between communities of Balochistani people (top left)

On the 20th anniversary of the fall of the Berlin Wall, BBC Mundo looks at barriers which are still standing - or have gone up since - around the world.

In 2007, Iran began to build a wall on the border with Pakistan, in an area known as Balochistan.

WALLS STILL STANDING West Bank Northern Ireland Saudi Arabia Melilla and Ceuta Cyprus Pakistan-Iran Rio de Janiero Mexico-US India-Pakistan Korean border Western Sahara Iraq-Kuwait Botswana-Zimbabwe

The authorities say the wall, still under construction, is to prevent the spread of illegal activities such as the movement of black market goods, drugs trafficking and illegal immigration.

However, some argue that these are not the only reasons, and that Tehran is also erecting a barrier in an effort to slow the arrival of Islamist extremists.

Although there is no official confirmation of the continued expansion of the wall, press reports from the region suggest that it could eventually reach 700km (435 miles) in length and 3m (9ft) in height.

The Balochistanis, who live on both sides of the border and in the area where both countries neighbour Afghanistan, have had their communities divided by the wall.

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