"Allegedly, customs officials favoured Ispat and in return received bribes between 2006 and 2010. The fact came to light after seizures made by the Income Tax Department on Ispat offices," the CBI spokesperson in a statement.
The CBI had also carried out searches at 13 places (11 residential and two office premises) including offices of Commissioner Shobha Ram and Additional Commissioner B S Meena.
Searches were still on, the CBI official said.