U.S. Defense Secretary Ash Carter said on Wednesday that the country is prepared to assist the Iraqi army with more personnel and equipment to help them fight Daesh militants and urged Russia to get on the 'right side' of fight against the terrorist group.

Carter said that the U.S. would provide attack helicopters and additional military advisers in the fight to retake a key city in western Iraq.

Iraqi forces advanced on Ramadi, the provincial capital of Anbar province, earlier this week, capturing a military operations center and a neighborhood on the outskirts of the city. Daesh fighters captured Ramadi in May in a major setback for Iraqi troops.

Carter told the Senate Armed Services Committee that tough fighting remains ahead and if requested by Iraqi Prime Minister Haider al-Abadi , the U.S. will provide the helicopters and advisers to help "finish the job."