The Archaeological Survey of India (ASI) was conducting repair works at the site where the cartridges were found.
The cartridges were buried in a sack and were recovered Tuesday when labourers were digging at a spot near the wall of the fort. "They (cartridges) are mostly of AK-47 rifles and it appears that they were buried here for long. The matter is being probed," Deputy Inspector General of Police (Agra) Brij Bhushan said.
However, police sources have said that two people have been arrested for questioning and initial investigations have revealed that the cartridges were to be supplied to criminals.
Published 23 September 2009, 04:54 IST