The Federal Aviation Administration is investigating a narrowly missed midair collision between a United flight and a Delta flight at Phoenix Sky Harbor International Airport on Saturday, the agency said.

The close call between the United and Delta flights at the Phoenix airport comes amid an increase in plane near-collisions.

The two flights, United Airlines Flight 1724 and Delta Air Lines Flight 1070 came too close to each other while arriving at the airport.

FAA officials say the two planes "landed safely after experiencing a loss of required separation" as they were headed to Sky Harbor.