Business sentiment indicators for France's manufacturing and service industries remained unchanged in September, while sentiment in the construction industry improved from August, the Bank of France said.

The September manufacturing business sentiment indicator was unchanged from the previous month at 104. Industrial production grew moderately as growth remained almost unchanged in most sectors, with the exception of chemicals and pharmaceutical industries, which posted a "significant" rise.

The index for services remained stable at 100, as service sector activity posted "robust" growth in September, with particularly strong growth in temporary work, consulting and transport.

The construction business sentiment indicator ticked up to 104 in September from 103 in August as order books improved. Activity in the sector firmed for both structural and finishing works.

Business leaders expect activity to rise in manufacturing, services and construction in October.

The Bank of France expects GDP growth to be 0.5% for the third quarter, according to the unchanged, third estimate by the bank, based on the monthly index of business activity.