Thousands of Yemenis are demonstrating in the capital Sanaa, calling on Ali Abdullah Saleh, president for more than 30 years, to step down.

This comes after mass protests in Egypt and a popular uprising in Tunisia that ousted its long-time leader.

Yemeni opposition members and youth activists gathered in four parts of the city, including Sanaa University, chanting anti-government slogans.

Humphrey Hawksley reports.