42-year-old Rajeev Sharma from Vaishali in Bihar, CB Bhakare (38) from Maharashtra's Buldhan and Parmar Stayapal Singh (28) from Sabarkantha in Gujarat are the jawans who lost their lives in the attack.
According to officials, the area has been cordoned off and search operation is on.
Some terrorists had attacked a joint party of CRPF and the state police in Sopore, officials said. Further details are awaited.
( With inputs from ANI )