Militants hurled a grenade at a security force party in village Pohu, 35 kms from here, at around 5.30 pm injuring three CRPF jawans, two policemen and three passers-by, police said.
The injured were rushed to a hospital where ASI Shamsher Singh of 183 battalion CRPF succumbed to injuries, they said.
The ultras escaped taking advantage of the panic caused by the blast, police said adding a hunt had been launched to nab them.
No militant outfit had claimed responsibility for the attack so far, police said.
Pulwama is going to polls in the third round of 5-phased Jammu and Kashmir assembly polls on December 9.