Mumbai: The growth rate of six key infrastructure industries declined to 5.3 per cent in June against 7.7 per cent a year ago pulled back by a fall in the production of crude oil and a slowdown in the output of other products.

The growth of the six infrastructure industries with a combined weight of 26.7 per cent in the index of industrial production (IIP), was also lower at 6.9 per cent during the April-June quarter as against 7.4 per cent in the first quarter of 2006-07, according to official data.

Barring electricity, every other industry - petroleum refinery products, coal, cement and finished steel - recorded a slow growth in June. Crude oil production declined in June by 1.8 per cent to 27,74,000 tonnes compared to 28,26,000 tonnes a year ago.

Electricity, which has the largest weight of over 10 per cent in IIP, however, grew by 6.8 per cent in June compared to 4.9 per cent in the same month last year.