A security alert at London’s Gatwick Airport delayed dozens of flights and left arriving passengers scrambling for alternative ways to get home after authorities evacuated one terminal and shut the airport train station for more than four hours on Friday.

London's Gatwick airport evacuated part of its south terminal on Friday over an unspecified "security incident."

Train service is resuming and people are returning to the South Terminal at London Gatwick Airport after a security alert forced the evacuation of part of the city's secondary international hub Friday.