NEW YORK – Mike Wallace was recovering from triple heart bypass surgery that was performed last week, CBS News said Tuesday.

Wallace, who turns 90 this spring, is already walking following the surgery Friday to bypass blockages near his heart. Doctors are calling the operation “a great success,” the network said.

Recovery from heart bypass surgery generally runs about six weeks.

The veteran “60 Minutes” correspondent, who is essentially retired, recently interviewed Roger Clemens about allegations of steroid abuse.