The Islamic State extremist group fired a munition at an Iraqi air force base that tested positive for mustard gas, the US Defence Department said Wednesday.
The propaganda chief of extremist group Islamic State was killed in an airstrike by forces of the US-led coalition fighting the militia in Iraq and Syria, according to the Pentagon.
The Pentagon on Monday confirmed that the main spokesman of the Islamic State extremist group, Abu Mohammed al-Adnani, was killed last month in northern Syria.
The US Navy said Tuesday one of its ships had again been harassed by Iranian vessels in international waters in the Persian Gulf.
The leader of the Islamic State movement's Afghanistan branch was killed last month in a US airstrike, the Pentagon said Friday.
Russian fighter jets made numerous low-altitude passes close to a US military ship in the Baltic Sea earlier this week, US defence officials said Wednesday.