Saudi ambassador on Yemen role

Aid workers in Yemen say an air strike at a refugee camp in the north of the country has killed 40 people and wounded at least 200 others.

State media said Saudi planes were responsible, but Yemen's foreign minister said the deaths and injuries at the Al-Mazrak camp in Hajjia province had been caused by what he called artillery strikes by Iranian-backed Houthi rebels.

The BBC's security correspondent Frank Gardner spoke to Prince Mohammed Bin Nawaf Al-Saud, the Saudi ambassador to the UK, about Saudi Arabia's role in Yemen.