Two more mortar shells and a rocket launcher were recovered from a pond near the martyrs' memorial on the Rajshahi University (RU) campus yesterday morning.
An official of the Rajshahi University noticed a mortar shell in the pond and informed police, said Sub-Inspector (SI) Imran Hasan of Motihar Police Station.
On information, police personnel from Kazla checkpoint rushed to the spot and recovered two mortar shells and a rocket launcher from the pond, the SI said.
The police station's Officer-in-Charge Siddikur Rahman told The Daily Star, "We have informed the bomb disposal unit of Bangladesh Army about the recovery."
"They will come to the campus on Saturday [today] to defuse it," the OC added.
On April 27, another mortar shell was found in the same pond by members of Rapid Action Battalion (Rab).
A bomb disposal unit of army deactivated the shell later.
Students' dormitory Shaheed Shamsuzzoha Hall is situated near the pond.
The shells can be from 1971 as the dormitory was used by Pakistan army as their camp during the Liberation War, Rab officials had said earlier.