CHICAGO (CBS) — The new CEO of United Airlines, Oscar Munoz, has been hospitalized, reportedly after suffering a heart attack.

“We have been informed by Oscar’s family that he was admitted to the hospital on Thursday and we will provide further details as appropriate,” the airline said in a statement. “In the meantime, we are continuing to operate normally. Our thoughts and prayers are with his family and we are respecting their privacy.”

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The airline gave no explanation or details of his condition.

The Wall Street Journal reported that Munoz suffered a heart attack.

“This creates a lot of uncertainty for United at a time when the company is trying to chart a new course for itself,” Micah Maidenberg, transportation and aviation reporter for Crain’s Chicago Business, tells CBS 2’s Suzanne Le Mignot.

Munoz, 56, was named CEO of Chicago-based United Continental Holdings Inc. on Sept. 9 after the company made a stunning announcement that CEO Jeff Smisek had stepped down.

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Smisek faced questions about whether United sought favors from the officials who operate the New York-area airports.

Federal prosecutors are investigating United’s ties to David Samson, the former chairman of the Port Authority of New York and New Jersey and a political ally of New Jersey Gov. Chris Christie.

Munoz was a railroad executive who had spent 11 years on the boards of Continental Airlines and United Continental, which was formed by the 2010 merger of United and Continental.

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 cancellations. United’s on-time performance has trailed its three biggest peers — American, Delta and Southwest — so far this year. In the ad, Munoz said United had failed to live up to its promises and vowed, “That’s going to change.”

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