The country's infrastructure sector grew 5.2 per cent in June this year–the fastest in two months–on the back of double-digit growth in the coal and cement sectors. The eight infrastructure sectors had expanded 3.1 per cent in June last year, and 2.8 per cent in May this year.According to official data released, coal production surged 12 per cent in June this year, cement production increased 10.3 per cent, fertilizer production rose 9.8 per cent, and petroleum refinery production expanded 3.5 per cent during the month. Electricity generation grew 8.1 per cent, and steel output rose 2.4 per cent in June. But natural gas output declined 4.5 per cent and crude oil production fell 4.3 per cent in June.