A number of states have confirmed they were targeted by the mailings, including Oklahoma, Ohio and Louisiana.

Yemen's information minister says the prime minister and other ministers were unhurt when ballistic missiles hit al-Maashiq Palace.

Protests have taken place over the rules which have seen pupils wearing hijabs turned away from schools.

Trump said some would "rather not watch" the execution of Nidal Hasan, the first military execution in over 60 years.