"Pained to hear that four policeman have been killed in an IED explosion in Sopore. My deepest condolences to their families," Mehbooba wrote on Twitter.
Former chief minister Omar Abdullah tweeted: "Very sad news from #Sopore. May the four brave J&K police personnel killed in the line of duty today rest in peace."
Four policemen on patrol duty were killed when an improvised explosive device (IED) planted by militants went off in Sopore town in north Kashmir today.