Details have emerged of huge casualty figures in the Libyan city of Benghazi, where troops have launched a brutal crackdown on protesters.

More than 200 people are known to have died, doctors say, with 900 injured.

The UK's Foreign Secretary, William Hague, told the son of Colonel Gaddafi that the crackdown was "unacceptable" and urged reform.

Bridget Kendall reports.