Panaji, Nov 29 (IANS): Enforcement Directorate (ED) officials Friday interrogated Swiss bank account holder Radha Timblo's son, Chetan in connection with the Rs.35,000 crore illegal mining scam probe, an official said.

This is the second time in a fortnight that the scion of the Timblo mining clan has been called for questioning. The ED official also said that Timblo was questioned over several hours and documents related to the mining company which he co-owns along with his mother were scrutinized.

Three directors of companies owned by the Timblo family, namely Arvind Hodarkar, Gurudas Kanekar, Sanjay Alberto were also interrogated through the week, an official said.

Radha Timblo was in the news few weeks back, after her name was revealed by the Central government to the Supreme Court, along with the names of two other Indians, who are operating a Swiss bank account.

She was grilled by ED for several hours on two occasions in the last one month, on the issue of under-invoicing of bills for iron ore exported by her company to China.

The under invoicing one of Radha Timblo's firm, Timblo Pvt. Ltd, has also found mention in the Justice M.B. Shah Commission report which exposed the illegal mining scam.