Abdel-Wahab al-Saadi, the top military commander in Iraq's Salahuddin province, said ground forces entered the Beiji oil refinery today, days after a number of IS militants carried out a large-scale attack and briefly took over a small part of the complex.
"It is another victory achieved by Iraqi security forces that are growing confident in the war against the terrorists," al-Saadi told The Associated Press in a telephone interview.
A day earlier, Iraqi soldiers, backed by US-led coalition airstrikes and Shiite and Sunni militias dubbed the Popular Mobilisation Forces, gained control of the towns of al-Malha and al-Mazraah, located 3 kilometres south of the Beiji refinery.
Iraqi forces recaptured Tikrit, capital of Salahuddin, on April 1 and have been gradually pushing their offensive north to secure the rest of the province.
Militants from the Islamic State group seized Ninevah province and much of Salahuddin and Anbar provinces last summer during their advance across northern and western Iraq.