Three British men were detained in Germany late Saturday after allegedly having conversations involving terrorism on board a flight from Slovenia to London.
The men were released Sunday, ABC News reported.
The EasyJet flight was diverted to Cologne, Germany, where police questioned the men and examined their belongings.
No evidence was found to support that the men, aged 31, 38and 48, were plotting a terror attack.
Easyjet flight to London Stansted from Ljubljana diverted to Cologne due to backpack in the cabin which did not belong to any passenger⚠— Flight Alerts ⚠ (@FlightAlerts777) June 10, 2017
Several alerts went out on social media about the diverted flight.
The incident comes after a series of ISIS-inspired attacks in the United Kingdom that have taken place since March.
"EasyJet can confirm that flight EZY3246 from Ljubljana to London Stansted diverted to Cologne on the 10 June," the airline said in a statement. "The captain took the decision as a precaution to enable the aircraft to go through additional security checks in Cologne where the aircraft was met by the police."
“We thank passengers for their understanding," EasyJet said in the statement.
The situation began when a female passenger overheard a conversation between the men on the flight Saturday, police said.
One of the men had a book with a picture of a sniper rifle on it, along with the word "kill," police said. All 151 passengers had to exit the plane, according to the Associated Press.
Some passengers were injured while exiting the plane.
Authorities also carried out a "controlled explosion" on a backpack belonging to one of the men that contained wires, but these turned out to be part of a charging device, according to the AP.
--The Associated Press contributed to this report.