Pakistan's army has confirmed 141 people died, including 132 children, in the attack on the Army Public School in its northwest city of Peshawar on Tuesday.
Nine staff members were killed and an additional 121 students and three staff members were wounded.
A military spokesman confirms the rescue operation has been completed, saying seven attackers, all fo them wearing explosives vests, died in the assault.
Tehreek-e-Taliban, a Pakistani militant group trying to overthrow the government, has claimed responsibility for the attack.
The Taliban said the attack is in revenge for government raids in Pakistan's northwest, which has reportedly left hundreds of Taliban militants dead.
The school attack has drawn condemnations from around the world.
Visiting Chinese Premier Li Keqiang says China wants to seek new models of financing investments in central and east Europe and it would create a new investment fund of 3 billion U.S. Dollars.
He made the remarks while addressing the China-Central and East Europe summit in Belgrade, Serbia, on Tuesday.
Trade between China and the region, which has expanded five-fold since 2003, is high on the agenda of the two-day summit.
Li Keqiang had met with leaders of 16 CEE countries ahead of the meeting, where they agreed to promote cooperation in areas ranging from infrastructure to energy.
After the summit, Li Keqiang will pay an official state visit to Serbia.