A method performed by a wireless device (121) for receiving system information from a network node (110) in a wireless communications network (100) is provided. The wireless device first receives a first system information indicating one or more Public Land Mobile Networks, PLMNs, supported on a frequency carrier by the network node (110). Then, the wireless device determines if the one or more PLMNs indicated in the first system information exclude all PLMN(s) supported by the wireless device (121). When the one or more PLMNs indicated in the first system information does not exclude all PLMN(s) supported by the wireless device (121), then the wireless device receives a second system information comprising the one or more PLMNs supported on the frequency carrier by the network node (110). A wireless device (121) for receiving system information is also provided. Further, a network node and a method therein for transmitting system information are also provided.