BAGHDAD -- Iraq's interior ministry says a large explosion at an ammunition depot southwest of the capital, Baghdad, has injured 13 people, most lightly.
Maj. Gen. Saad Maan, a ministry spokesman, said it was not immediately clear what caused the blast at the al-Saqr military base.
The explosion was heard throughout the city and smoke billowed in the air Monday evening.
The base houses a weapons depot for the Iraqi federal police and the mainly Shiite militias known as the Popular Mobilization Forces. The state-sanctioned PMF militias, which also receive backing from Iran, have fought alongside Iraq's regular armed forces against the Islamic State group.