Abstract: An arrangement for detecting a downhole drilling event during a drilling operation by a drill pipe being partially surrounded by a tubular, wherein the arrangement comprises a sensors holder to be mounted inside of the tubular and to be mounted to surround part of the drill pipe, a plurality of sensors for sensing sensor data indicative of downhole drilling events, wherein at least part of the sensors is mounted on the sensors holder, and a processor configured for processing the sensor data to thereby detect a downhole drilling event.