An arrangement (30) for detecting a downhole drilling event during a drilling operation by a drill pipe (6) being partially surrounded by a tubular (2), wherein the arrangement (30) comprises a sensors holder (4) to be mounted inside of the tubular (2) and to be mounted to surround part of the drill pipe (6), a plurality of sensors (8-11) for sensing sensor data indicative of downhole drilling events, wherein at least part of the sensors (8-11) is mounted on the sensors holder (4), and a processor (32) configured for processing the sensor data to thereby detect a downhole drilling event.