Raipur, July 8 -- The Chhattisgarh Economic Offences Wing (EOW) detained Congress treasurer Ramgopal Agrawal for questioning in connection with the alleged coal levy case and other cases, officials said on Wednesday.

In a statement, the EOW said Agrawal had remained unavailable for investigation for a long time, leading a court to issue a warrant against him under the Prevention of Corruption Act.

Officials said Agrawal is being questioned over documents, digital evidence and a diary seized from Suryakant Tiwari, an accused in the alleged coal levy case.

"The diary seized from Suryakant Tiwari contains entries of crores of rupees in the name of Congress Bhawan. The investigation so far has revealed that the amount was received by Ramgo...