A method, in a network node (760, 760b) in a communications network, for determining which of a first category associated with a first wireless device behaviour and a second category associated with a second wireless device behaviour each of a plurality of wireless devices (103, 710) fall into, the method comprising: determining based on binary classification of first information which of the wireless devices (103, 710) meet all of at least one primary criterion; wherein the first information comprises one or more measurements of timing advance, TA, measurements, an amount of requested uplink resources; uplink signal strength measurements; handover statistics; line of sight detection in downlink; transmitting a request for second information to the wireless devices (103, 710) that meet all of the at least one primary criterion; wherein the second information comprises one or more of measurements on dedicated uplink pilot transmissions, sounding reference signal, SRS, a Random Access Channel, RACH, transmissions and their respective measurements in neighboring base stations, periodic downlink measurement reports comprising measurements of reference signal received power from different cells; channel state information reference signal, CSI-RS, related measurement reports; receiving the second information from each of the wireless device (103, 710) that meet all of the at least one primary criterion; determining based on binary classification of the second information which of the wireless devices (103, 710) that meet all of the at least one primary criterion also meet all of at least one secondary criterion; and classifying the wireless devices (103, 710) that meet both all of the at least one primary criterion and all of the at least one secondary criterion into the first category, wherein the first category comprises a drone category and the second category comprises a non-drone category. determining based on binary classification of first information which of the wireless devices (103, 710) meet all of at least one primary criterion; wherein the first information comprises one or more measurements of timing advance, TA, measurements, an amount of requested uplink resources; uplink signal strength measurements; handover statistics; line of sight detection in downlink; transmitting a request for second information to the wireless devices (103, 710) that meet all of the at least one primary criterion; wherein the second information comprises one or more of measurements on dedicated uplink pilot transmissions, sounding reference signal, SRS, a Random Access Channel, RACH, transmissions and their respective measurements in neighboring base stations, periodic downlink measurement reports comprising measurements of reference signal received power from different cells; channel state information reference signal, CSI-RS, related measurement reports; receiving the second information from each of the wireless device (103, 710) that meet all of the at least one primary criterion; determining based on binary classification of the second information which of the wireless devices (103, 710) that meet all of the at least one primary criterion also meet all of at least one secondary criterion; and classifying the wireless devices (103, 710) that meet both all of the at least one primary criterion and all of the at least one secondary criterion into the first category, wherein the first category comprises a drone category and the second category comprises a non-drone category.