A Yemeni guard has been killed in an explosion near the US embassy in the Yemeni capital, Sanaa, an official has said, quoted by AP news agency.
A mortar was fired at a school next to the embassy in the central district of Sawan, reports say.
Other guards and some children were said to be wounded. It is not clear whether the embassy was the target.
In January, two Belgian tourists and their driver were killed after gunmen ambushed their convoy in eastern Yemen.