Three people were shot and another person was stabbed at Phoenix Sky Harbor International Airport in Arizona during a family dispute in one of the terminals on Christmas night, police said.

Operations are back to normal at Phoenix Sky Harbor airport Thursday after an apparent family fight erupted into gunfire in the airport's busiest terminal Wednesday night, injuring four people, one critically.

Police are investigating a Christmas shooting at Sky Harbor Airport in Phoenix that left three people wounded by gunfire and another person stabbed.