The US State Department says the government should conduct a transparent investigation into the attack on a Yemeni hospital.
According to media spokesman Robert Pallasino, the attack was a very dangerous situation.
Seven people including children were killed by a missile attack at a Yemenite hospital recently.
The United States Department of Homeland Security spokesman has said that this type of attack is a serious problem for the protection of Yemen civilians.
He also stressed the need to prevent such clashes from happening at the press conference.
