A method performed by a network node (110) for handling cellular communications and Device-to Device, D2D, communications of user equipments (121, 22, 123, 124) served by the network node (110) in a wireless telecommunications network (100) is provided. The network node determine, for at least one Physical Radio Resource, PRR, to be scheduled for both cellular and D2D communications of the user equipments (121, 122, 123, 124), a number of spatial streams to be used by the cellular and D2D communications of the user equipments (121, 122, 123, 124). The network node then transmits an indication of the number of spatial streams of said determined number of spatial streams to be used in D2D communication on the at least one PRR to at least one user equipment of at least one D2D pair of user equipments (123, 124) determined to be scheduled for D2D communication. A network node (110) for handling cellular communications and Device-to Device, D2D, communications of user equipments (121, 122, 123, 124), and a UE and method therein for configuring a Device-to-Device, D2D, communication with another user equipment (123, 124) are also provided.