Two United Airlines jets made contact during an incident at San Francisco International Airport Monday night, prompting the cancellation of both flights.

In a statement, the Federal Aviation Administration said United Flight 863 heading to Sydney, Australia and United Flight 877 bound for Hong Kong were the two planes involved. Flight 863’s left wingtip collided with the right wingtip of Flight 877 about 12:35 a.m., the FAA said.

Less than a month after two planes clipped wings at Washington D.C.'s Ronald Reagan Washington National Airport, the same happened at California's San Francisco International Airport on Tuesday, May 6.