MOSCOW, Jan 27 (Reuters) - Russian Deputy Prime Minister Alexander Novak said on Saturday that repair work on Lukoil's NORSI oil refinery will take at least a month or a month and a half, TASS news agency reported.

Lukoil said earlier this month that it had halted a unit at Russia's fourth largest refinery, located near the city of Nizhny Novgorod, some 430 km (270 miles) east of Moscow, after an "incident", without elaborating. (Reporting by Vladimir Soldatkin; editing by Jason Neely)