The growth of eight core sectors slipped to 2.4 percent in July 2017, on the back of contraction in output of crude oil, refinery products, fertiliser and cement.
The eight core sectors had registered a growth rate of 3.1 percent in July 2016.
The output of crude oil declined by 0.5 percent, while growth in output of refinery products and fertiliser decreased by 2.7 percent and 0.3 percent respectively.
The output in cement also fell by two percent in July 2017. However, natural gas output rose by 6.6 percent.
Steel production and power generation accelerated to 9.2 percent and 5.4 percent, respectively.