New Delhi: Taking forward its crusade against companies which are sitting idle on captive coal blocks allotted to them, the government has asked firms to furnish status report on the progress made in development of these blocks in the October-December period.

"You are requested to send the detailed information for the quarter ending December, 2011, in respect of allocated coal/lignite block and associated end use project along with the reasons on delay in implementation of the coal/lignite project," an official document of the coal ministry said.

"The blocks which have attained peak rated capacity of mine, need not furnish status report of coal block. But the status of linked end use projects need to be furnished," the document added.

While taking back 14 coal and one lignite block, the government had earlier also issued warnings to 29 coal and three lignite mine allottees for beginning production on time, else face the consequences of loosing mining rights of the blocks.

Warnings were issued to firms, including NTPC and Jindal Steel and Power.

As part of the deallocation drive of the coal ministry, the firms which had to part away with their mines includes NTPC, Andhra Pradesh Power Generation Corporation, Shree Bhaidyanath Ayurved Bhavan, Jharkhand State Electricity Board, Damodar Valley Corporation and Gondawana Ispat, among others.