New Delhi, Dec 21 (IANS) A Central Bureau of Investigation (CBI) team Tuesday questioned corporate lobbyist Niira Radia at her house here in connection with the 2G spectrum scam a day after the agency quizzed former telecom watchdog chief Pradeep Baijal.

A team of sleuths, accompanied by women officers, reached Radia's Chattarpur residence in south Delhi to question her. Radia'a firm Vaishnavi Corporate Communication said she was cooperating with the CBI.

Officials of Vaishnavi Corporate Communication told media houses: "We will continue to extend full cooperation to the CBI."

The CBI has also summoned former communications minister Andimutu Raja for questioning. He will be quizzed a few days later. On Monday, former Telecom Regulatory Authority of India (TRAI) chief Pradeep Baijal was summoned for questioning in connection with the 2G spectrum scam.

The trio's premises were also raided by the investigative agency last week.

Baijal was the TRAI boss between 2004 and 2008. He joined Radia's firm in 2009. The Enforcement Directorate too has grilled Radia about her role in the spectrum allocation.

The Comptroller and Auditor General report, tabled in parliament, has criticised the allocation of second generation airwaves to telecom firms in 2008 and said it has caused massive losses to the national exchequer.