A United Airlines flight bound for Spain was forced to make a mid-air U-turn over the weekend after the discovery of a suspiciously named Bluetooth device sparked a major security scare. Flight tracking data reveals that the plane, which departed from Newark, New Jersey, for a scheduled eight-hour journey to Palma de Mallorca, instead returned and touched down right back where it started after spending nearly four and a half hours in the air.

The flight to Palma de Mallorca diverted back to Newark late on Saturday. Air traffic audio and social media posts indicate an onboard Bluetooth device raised security concerns.

A United Airlines flight from Newark to Spain turned around midflight Saturday due to a possible security threat.