It comes as Norwegian police investigate an explosion that occurred outside the US embassy in Oslo on Sunday.

The purchase is part of wider plans to prevent major artworks from being bought by private collectors.

Salem Michel Al-Salem, accused of crimes committed in Syria in 2011 and 2012, has been named for the first time.

Iranians in Tehran and Karaj tell the BBC they are exhausted and struggling to sleep after 10 days of Israeli and US attacks.