The embodiments herein relates to a network node, a UE, and methods thereof for reliable group transmissions. The method in the UE comprises receiving, from a network node, at least one signaling comprising HARQ parameters including a diversity distance between a HARQ transmission and a subsequent HARQ re-transmission and information on a number of retransmissions; receiving at least one transmission comprising at least one packet from the network node; decoding the received at least one packet; if the decoding of the at least one packet is successful, encoding the at least one packet and retransmitting, to at least one other UE of the group, the at least one transmission including the at least one encoded packet, wherein retransmitting of the at least one packet is performed simultaneously as retransmission of the at least one transmission from the network node to the at least one other UE of the group.