Indian factories increased production in September at the fastest pace since March ahead of an expected surge in demand during the country's festive season, according to a Reuters poll.
Coal, electricity and cement production in particular, along with an uptick in demand for India's products abroad, are also expected to have contributed to overall factory output growth in September.
Production at factories, mines and utilities in India likely rose 3.5 per cent annually in September, much faster than August's 0.6 per cent growth, a poll of 24 economists showed.
Good factory growth in September would be welcome news for the struggling Indian economy, but some economists say momentum is unlikely to be sustained.
"The expectations are that overall, in order to meet the festive related demand, production would have been ramped up," said Upasna Bhardwaj, an economist at ING Vysya Bank.
India's festive season usually begins in October and is characterised by increased spending on products ranging from sugar to gold to bigger items such as cars and electronic appliances.
Production in the core sectors - also known as infrastructure output, which includes coal, electricity, cement, crude oil and steel factories -