Abstract: A method performed by a network node for handling load balancing of at least one User Equipment (UE) is provided. The at least one UE has performed a respective handover to a Second Frequency, F2, carrier provided by the network node in a communication within a wireless communication network. The network node evaluates (201) whether or not each of the at least one UE has resided at the F2 carrier for a respective time period which is below a first threshold value. The network node decides (202) that one or more first UEs out of the at least one UE shall be put through a further evaluation for load balancing when any one or more of the first UEs have resided at the F2 carrier for a respective time period which is below the first threshold value. The network node decides (203) that each one or more second UEs out of the at least one UE is a candidate for load balancing when any one or more of the second UEs have resided at the F2 carrier for a respective time period which is not below the first threshold value.