The FAA is investigating after two planes became too close together while approaching Phoenix Sky Harbor International Airport over the weekend. The Delta Airlines and United Airlines flights were both approaching the airport to land Saturday around 1 p.

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

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