Rejecting charges of wrongdoing in coal block allocations, Prime Minister Manmohan Singh on Monday said the government has already initiated the process of cancelling mines to companies which failed to develop them and action would be taken against 'wrongdoers' if any.

"We have initiated action to cancel the allocations of allottees who did not take adequate follow-up action to commence production," Singh said in a statement in both Houses of Parliament amid uproar created by the BJP.