NEW DELHI, May 6 (Reuters) - India's Reliance Industries will shut some units at its 660,000 barrels per day refinery for 3-4 weeks for maintenance after Nayara Energy resumes operations later this month, a senior petroleum ministry official said on Wednesday.

Reuters reported on Tuesday that Reliance plans to shut a crude unit and some secondary units at its 660,000 barrels per day refinery for routine maintenance.

(Reporting by Nidhi Verma, writing by Tanvi Mehta; Editing by YP Rajesh)