OMAHA, Neb. (AP) — A United flight made an unscheduled landing in Omaha after the pilot became ill.

United spokeswoman Karen May said Tuesday that Flight 1637 was on its way from Des Moines to Denver on Monday night when the decision was made to set down in Omaha. The co-pilot landed the Boeing 737 without incident just after 9 p.m., and May says the pilot was taken to a local hospital.

May says United put up the passengers overnight in Omaha, and they’re scheduled to complete their travel later Tuesday. May says there were 154 passengers and six crew members aboard the original flight.

May said Tuesday that the captain “is OK.” She wouldn’t provide other information about him or her.