United Airlines new CEO admitted to hospital
The Wall Street Journal reported that Munoz suffered a heart attack, citing people familiar with the matter.
Munoz, 56, was named CEO of United Continental on Sept. 8 after the company made a stunning announcement that CEO Jeff Smisek had stepped down.
In a newspaper ad this month, Munoz apologized to customers for problems that have plagued United since the merger, including several technology outages that have caused large-scale flight delays and cancelations.
On an introductory conference call with Wall Street analysts last month, Munoz said United must convince customers that it will improve customer service but added, "That is going to take a lot of time and effort."
While United was slower to return to profitability after the financial crisis that began in 2008, it has posted record profits recently, helped by cheaper jet fuel.
The Association of Flight Attendants, which represents cabin crews at United, issued a statement saying that with "the upsetting news of United CEO Oscar Munoz's heart attack," it offered support to his family and friends.