A U2 show marking the 20th anniversary of the fall of the Berlin Wall has run into controversy¹ - after organisers built a wall around the venue².

一场旨在标志柏林墙被推倒20周年的U2音乐会遭质疑——活动举办者在会场周围建了一座墙。

U2 moved to Berlin in 1990 to record their Achtung Baby album

A two metre barrier has been erected³（竖立） around the Brandenburg gate to keep out people without tickets for the show.

"It's a shame that a barrier has been set up. It's stopping many Berliners from hearing the concert," local politician Frank Henkel told the BBC.

The U2 show is part of the MTV Europe Music Awards, which take place later.

Ten thousand tickets were given away free online and snapped up（抢购） within hours.

Now police in the city say they're expecting as many as 100,000 people to descend⁴ on the square in front of the Brandenburg gate to try and catch a glimpse of U2.

Mr Henkel, Christian⁵ Democrat⁶ floor leader in the Berlin city-state parliament, said: "It would have been so much better if as many Berliners as possible could have taken part.

"We don't know who's responsible for this, whether it's U2 or MTV.

He continued: "10,000 people is a lot, but U2 could have had an even bigger audience enjoying their music at this wonderful location."

U2 manager Paul McGuinness said Berliners think it is "pretty ironic⁷" that an event to mark the falling of the wall has resulted in another one being constructed.

Fans, too, were displeased⁸.

"It's completely ridiculous that they are blocking the view," said Louis-Pierre Boily, a Canadian fan who travelled to Berlin despite failing to secure（固定，获得） tickets for the show.

"I thought it's a free show, but MTV probably wants people to watch it on TV to get their ratings up," he added.

Berlin politicians had previously⁹ dissuaded¹⁰（劝阻） US President Barack Obama from visiting the city as part of the celebrations, for fear his security operation would require several main roads be blocked off.

It is now feared road blocking will be necessary to accommodate（调节） U2's fans.

Calls to representatives of U2 and MTV seeking comment have not yet been returned.