A method by a first network node for handling directions of transmission of beamformed beams by a first radio network node. Both nodes operate in a wireless communications network. The first network node determines, out of a set of directions in which the first radio network node is capable of transmitting the beams, a subset of directions of transmission of the beams having a probability of detection above a threshold, by a first wireless device. The determining is based on data obtained from previous attempts of positioning one or more second wireless devices using at least some of the directions. The first network node also initiates providing, to at least one of the first radio network node and a second network node operating in the wireless communications network, an indication of the determined subset.