Unexploded World War II hand grenades have been discovered close to Gatwick Airport.
Network Rail staff found the explosives while working near Gatwick Airport railway station in West Sussex.
A bomb disposal team was called in to carry out a controlled explosion at about 10:50 BST, Sussex Police said.
Outgoing flights from the airport and rail services were halted as a precaution for about 15 minutes but have since resumed.
The alert affected train services run by Gatwick Express, Southern, First Capital Connect and First Great Western.
A spokesman for Sussex Police said officers received the alert near the airport's South Terminal forecourt approach road.
He said: "The immediate area was cordoned off and a military ordnance disposal team attended."
The bomb disposal team found three hand grenades, one four-inch mortar and a smoke grenade in a metal container and identified them as World War II explosives, he added.
He said: "The cordon did not affect traffic or any other access to or from the airport and at no stage was there any danger to the public.
"Train and air arrivals and departures were suspended for 15 minutes purely as a precaution when the controlled explosion was being carried out.
"There was no damage or injury and the incident is now closed."