Chennai, Dec 16 (PTI): Enforcement Directorate (ED) today searched the office of Karti Chidambaram, son of former Finance Minister P Chidambaram, in connection with its probe against firms owned by his friends.

The ED action invited strong criticism from Chidambaram Sr who said "nothing was found" in the "fishing and roving" enquiry and he would like to see how far a "foolish" government would go in "harassing" him.

Karti Chidambaram issued a statement that some officers of the investigating agencies visited his office today.

"I was informed that they are investigating three firms. Two of the firms belong to my friends. They are owned by professionals and managed by competent Board of Directors. I am not aware of the third firm," he said in the statement.

ED officials said they searched a room they had locked in the office premises of Karti as part of their operation that was executed on December 1. "Some documents have been seized," they said.

Officials said the room could not be opened on December 1 and was sealed. It was opened today and Karti was informed accordingly, they said.

Karti, in his statement, reiterated he had no "economic interests" in the firms being investigated by the probe agencies as he expressed surprise over the action conducted today.

"I made it clear to the officers what I had publicly stated earlier. Neither I nor any member of my family is a shareholder or Director of any of the said firms. We do not have any economic interests in the said firms," he said.

Karti said he had no doubt that the two firms owned by his friends will "answer any questions put to them and clear any allegation made against them."

"As can be expected when false allegations are made, nothing relating to the said firm was found in my office. Nothing relating to the said firms were taken from my office.

"As far as I am concerned I maintain that there was, and is, no basis for them to have visited my office or to make any enquiries in my office," Karti said.

While the ED is probing the case under the provisions of the Foreign Exchange Management Act (FEMA), the Income TAx department is investigating it on charges of alleged tax evasion.

Reacting to ED's action today, Karti's father P Chidamabram, who had last month accused the government of a "malicious onslaught" launched by it against his family, said his son has made a statement.

"As can be expected, nothing was found in the fishing and roving enquiry. I would like to see how far a foolish government will go in harassing him.

"I still believe that the departments I left behind have many officers who will act according to law and their conscience," Chidambaram senior said.