An All Nippon Airways flight made an emergency landing Thursday morning at Haneda airport after a sudden drop in cabin pressure, but no one was hurt, airport officials said.

With 270 passengers and crew members aboard, Flight 584 was traveling over the southern tip of Wakayama Prefecture on its way from Matsuyama, Ehime Prefecture, to Tokyo when the air pressure decreased around 10:45 a.m., causing oxygen masks to drop from the ceiling.

The Boeing 767 continued its flight and landed at Haneda at around 11:30 a.m., the officials said.

While no one was injured, several passengers complained of feeling ill, and a 70-year-old man visited a clinic at the airport.