Militants attacked residences of two ruling National Conference workers in downtown Srinagar city by hurling petrol bombs.
However, no one was hurt in the incidents that took place midnight last night, police said.
The ultras hurled petrol bombs at the residences of Mohammad Shafi Lone and Ghulam Mohammad Bhat, both National Conference workers, in Jamalatta locality of the old city, the police said.
Although no one was injured in the bomb attacks, the glass panes of both the houses were shattered due to the blasts, the police said.
They said preliminary investigations have revealed that at least three petrol bombs were hurled by the ultras.
Militants have stepped up attacks on political workers in Kashmir recently as the Valley prepares to go to Lok Sabha polls from April 24.
Militants also attacked the residence of youth National Conference leader Yawar Masoodi at Khrew in Pulwama district on Sunday, killing two cops, before they were eliminated by the security forces.