has been installed around the perimeter of the main summit venue for the upcoming G20 meeting in Seoul, South Korea, to keep out demonstrators and reduce the threat of attacks.
The city's COEX building will host leaders from 20 of the world's leading economies on November 11th and 12th.
Seoul's Metropolitan Police Agency said the fence was put up late last night (November 9th) and measures 2m in height, stretching for 2km.
The fencing is in response to planned rallies close to COEX by trade unions and labour groups.
However, a special G20 law states that rallies and demonstrations are not allowed to be staged within 2km of the venue.
According to the Korea Times, advanced facial recognition technology has also been set up at various checkpoints to screen possible terrorists.
The G20 was established in 1999 in response to the 1997 Asian financial crisis. Last year, summits took place in London and Pittsburgh.