World News from the BBC

An American court has sent the former newspaper baron Conrad Black back to prison for a further 13 months after ruling that he had not served enough time for defrauding investors. The Canadian-born businessman was released from prison last year after two of his four convictions were struck down on appeal.

Police in Zimbabwe have arrested a government minister

on suspicion of

undermining the authority of President Robert Mugabe. The minister, Jameson Timba, is an ally of the Prime Minister Morgan Tsvangirai in Zimbabwe's power-sharing government. Mr Mugabe's supporters have accused him of coordinating a media campaign against the president.

Archaeologists in Mexico have used a tiny video camera to explore a Mayan tomb under a pyramid that had been sealed for 1,500 years. The remote-controlled camera revealed brightly painted murals of human figures in a largely

intact

chamber. The researchers say the images will

shed new light on

the Mayan civilisation. Warren Bull reports.

Archaeologists first discovered this Mayan tomb in the jungle covered mountains of southern Mexico in 1999, but they have not been able to

excavate

it for fear of undermining the pyramid which lies on top. By lowering a camera the size of a matchbox five metres down into the chamber, they discovered nine black figures painted on blood-red walls, along with jade and shell fragments, which appear to be part of a funerary costume. Experts say the tomb could belong to the first ruler of the Mayan city state of Palenque - K'uk Bahlam I.