German police have shut down the Hamburg mosque where the 9/11 hijackers met before their suicide attacks on the US in 2001.

About 20 police officers searched the Taiba mosque early on Monday as its associated cultural organisation is suspected of helping extremists.

Investigators suspect that members of the "Islamic Movement of Uzbekistan" met at the Taiba mosque before going to a jihadist training camp.

The Taiba association has been banned.