A former US ambassador to Syria and Israel has told BBC Radio 5 live that President Bashar al-Assad is becoming increasingly "delusional and dangerous".

Mr Assad has insisted that Syria could retaliate Israel's apparent airstrike last week inside his country's borders but Edward Djerejian said it was unlikely he would.

Speaking to Up All Night, he said the main concern is that the sectarian violence in the country could overspill into neighbouring countries.