Shelter 'a big problem' at Libya-Tunisia border

The UN refugee agency has warned of a "humanitarian emergency" on Libya's border with Tunisia as thousands of migrant workers try to flee the violence.

The BBC's Jim Muir is at the Libya-Tunisia border where there are some 40,000 people, many of them Egyptian migrant workers who have fled Libya in the last few days.

World Food Programme is due to come to the area in the near future; Jim Muir says there is already a lot of activity from charities on the border.