Himachal Pradesh chief minister Virbhadra Singh Wednesday described the attack on a school in Pakistan as a "brutal cold-blooded massacre".
The Pakistani Taliban Tuesday slaughtered 141 people, 132 of them children, in a brazen terror attack on an army-run school in Peshawar city.
"Spraying bullets at innocent children is the most savage act of terrorists which shows their depravity and fear," he said in a statement.
"This was the most brutal cold-blooded massacre of adolescent school children and the terror should be dealt with heavy hand and total unforgiving crackdown on terrorists groups," Singh said.
The chief minister said: "We mourn the loss of young lives and pray for the peace of departed souls."
He hoped that Pakistan would take a tough stand to root out terrorists from its soil.