He identified them as assistant commissioners Mohan Singh Dabas of Delhi Traffic Police and Yad Ram of Police Control Room (PCR).
"(They) have been suspended on my orders ... for dereliction of duty," he told a news conference.
He said deputy commissioners Prem Nath of Delhi Traffic Police and Satyavir Singh Katara of PCR had been asked to explain their conduct vis-a-vis the police failure, Singh said.
Delhi Police has come under flak ever since six males raped a 23-year-old woman in a moving bus here Dec 16 and dumped her 40 minutes later along with her male friend, who was badly beaten.
The six accused, who have been arrested, were apparently drunk and on a joy ride. They had earlier robbed a man of Rs.7,000. But when he contacted police, they apparently failed to act.