After registering the case, the agency carried out searches at the premises of Maran brothers in Delhi and Chennai.
Maxis Communications Berhad (MCB), which has been named in a CBI chargesheet for alleged wrong doing in sale of Aircel, on Tuesday denied charges of using illegal means to acquire the firm from Siva Ventures and said it will pursue all legal remedies to defend itself and its officials.
Former Telecom Minister Dayanidhi Maran, his brother Kalanithi Maran and four others were on Friday chargesheeted by the Enforcement Directorate in the Special 2G court.
They were chargesheeted for alleged offences punishable under section 120-B (criminal conspiracy) of IPC and under relevant provisions of the Prevention of Corruption Act.
He was chargesheeted for the offences punishable under section 120-B
The agency, sources said, has issued the notices under the Prevention of Money Laundering Act (PMLA) and they have summoned the accused to examine them and record their statements.
On August 29, CBI had filed the charge sheet in the case against Dayanidhi, Kalanithi and six others, including four firms.
The ED had filed the first chargesheet in the case against Chidambaram's son Karti; later, a supplementary chargesheet was also filed against him.
The agency had "almost finished" its probe into the matter, which involved Dravida Munnetra Kazhagam leader and former telecom minister Dayanidhi Maran, an official said.
Special CBI Judge O P Saini took cognisance of the CBI's charge sheet filed against eight accused including four companies and summoned them on March 2, 2015.
The CBI had summoned Karti to appear before it on October 4.
Former Telecom Minister Dayanidhi Maran had "pressurised" and "forced" Chennai-based telecom promoter C Sivasankaran to sell his stakes in Aircel and two subsidiary firms to Malaysian firm Maxis Group in 2006, the CBI on Thursday told a special court.
The CBI had registered a case against former telecom minister Dayanidhi Maran, his brother MP Kalanithi Maran, Malaysian business tycoon and Maxis owner T Ananda Krishnan, and Maxis Director Ralph Marshall in October 2011.
The sources said the matter should have been referred to the Cabinet Committee on Economic Affairs as foreign investments above Rs 600 crore (Rs 6 billion) can only be cleared by Cabinet Committee on Economic Affairs headed by the Prime Minister.
Chidambaram was competent to give approval of upto Rs 600 crore but he gave the approval which was worth approximately Rs 3,500 crore
In April 2013, CBI had first told the Court there were "some difficulties" in the probe after it went abroad.
If convicted, the offences entail a maximum punishment of seven years.
Ferrari's Sebastian Vettel said he would still sleep soundly despite a mistake that cost him a home German Grand Prix win at Hockenheim and the Formula One championship lead on Sunday.
The ED said that Chidambaram has remained evasive and therefore grant of pre-arrest bail at this stage would be highly detrimental to the investigation.
Former Telecom Minister Dayanidhi Maran, his brother Kalanidhi Maran and six others, including four companies, were on Friday chargesheeted by the CBI in a special court in the Aircel-Maxis deal case arising out of the investigation in the 2G spectrum allocation scam.
Hamilton, eight points behind Vettel after 10 races, qualified 14th.
"The best team won, we struggled from the beginning and we couldn't deal with their long balls. Usually, you press the ball to win it, but this was different. They defended so deep and so well," City coach Pep Guardiola told the BBC.
Adolf Hitler's personal telephone which the Nazi dictator used to give deadly orders during the World War II has been sold for a whopping $243,000 (Rs 1.62 crore), more than double the starting price, at a US auction.
IMAGES from the English Premier League matches played on Saturday
Germany scored five times in 27 minutes in the first half to crush Estonia 8-0 and make it three wins in three Euro 2020 Group C qualifiers.
Manchester United kept up their impressive chase for a top-four spot with a comfortable 3-0 win at relegation-threatened Aston Villa in the English Premier League on Thursday. Relegation-threatened Bournemouth had a late goal disallowed by VAR as they had to settle for a 0-0 draw at home to Tottenham Hotspur.
Manchester United climbed two places up to second in the Premier League after Marcus Rashford scored deep into stoppage time to give them a fortuitous 1-0 home win over Wolverhampton Wanderers on Tuesday.
Nitin Gokhale, national security expert and founder BharatShakti.in, tells us what the controversy is all about.
With an aggressive Opposition and unyielding government, important legislation could be the biggest casualty, as details of the helicopter contract surface.