United Airlines flight maneuver to avoid another plane injures 2

United flight 2428 landed safely at San Francisco International Airport

Two United Airlines passengers were hospitalized last week after their plane had to suddenly slow its descent to San Francisco International Airport to avoid another aircraft, the airline said.

The incident aboard United flight 2428 occurred on Sept. 19 as the flight was traveling from Newark, New Jersey, the airline told Fox News Digital in a statement on Thursday morning. 

The aircraft began its descent with the seatbelt sign on when the pilots made the maneuver "to account for another aircraft at a lower altitude," according to the airline.

"Two customers, including one who was out of their seat at the time, reported possible injuries and were transported to a hospital," United Airlines said in the statement. "We’re grateful to our crew for their efforts to ensure the safety of our employees and customers."

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United Airlines plane in flight

The aircraft landed safely after slowing its descent to San Francisco International Airport last week, officials said. (Nicolas Economou/NurPhoto via Getty Images, File / Getty Images)

The Federal Aviation Administration (FAA) confirmed to Fox News Digital in a statement that the agency was investigating the incident.

United Airlines A319

Pilots aboard the aircraft responded to an onboard alert that another aircraft "was in the vicinity," the FAA said. (Charly Triballeau/AFP via Getty Images / Getty Images)

"United Airlines Flight 2428 responded to an onboard alert which occurred around 12:45 p.m. local time on Thursday, Sept. 19 in Oakland Air Route Traffic Control Center Airspace that another aircraft was in the vicinity," the FAA said. "The United flight landed safely at San Francisco International Airport."

united airlines

Two passengers aboard the United flight were taken to the hospital after reporting possible injuries, the airline said. (Robert Alexander/Getty Images / Getty Images)

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The FAA said "there was no loss of safe separation," which means that the two aircraft maintained a minimum distance from one another.

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Last month, a United Airlines flight traveling from Cancun to Chicago was diverted to Memphis, Tennessee, after the plane encountered "a brief period of severe turbulence" that left one passenger hospitalized and six others injured, officials said at the time.