Two taxiing planes collided at Miami International Airport on Saturday night, officials said, a day after a nationwide ground stop disrupted flights across the country.

At about 9 p.m. ET Saturday, the wingtip of a Copa Airlines Boeing 737 struck the nose of a UPS Boeing 767 as both aircrafts were taxiing, according to a statement from the FAA.

The Copa plane was taxiing to the gate, while the UPS plane was departing for Bogota, Colombia, the FAA said. The Copa flight had six crew members and 166 passengers aboard at the time of the collision, according to a statement from the airline.

Greg Chin, a spokesperson for the Miami-Dade Aviation Department, said in a statement that two people were treated at the scene for minor injuries and were not hospitalized.

The FAA said air traffic controllers had told the UPS crew to give way to the Copa flight.

UPS said in a statement that it was aware of the incident and “committed to working with authorities to determine what happened.” “The safety of our employees and the public is our highest priority,” the company said.

The collision came a day after the FAA issued a rare nationwide ground stop because of a widespread air traffic control telecommunication issue. The ground stop lasted more than four hours, and led to thousands of flight cancellations and delays. Officials believe a router problem during routine work was the cause of the outage.

As of 10:20 a.m. ET Sunday, 1,583 flights within, into or out of the U.S. had been cancelled, and another 2,944 were delayed.

Last year, 15 people were killed when a UPS cargo plane crashed just outside of Louisville, Kentucky’s Louisville Muhammad Ali International Airport.