Purity: Prohibited Burial Locations (Usurped Land and Endowments)
Practical Laws of Islam as per the teachings of Ayatullah Sistani
Ruling 611:
It is not permitted to bury a corpse in a place that is usurped nor in the ground of a place like a mosque, ḥusayniyyah,[1] or religious school that has been given as a charitable endowment (waqf) for purposes other than burial if it causes damage to the endowment or inconveniences the purpose of the endowment. In fact, based on obligatory precaution, it is not permitted even if it does not cause damage or inconvenience.
-Ayatullah Sistani, Practical Laws of Islam, Purification (Taharah)
1
A husayniyyah is a congregation hall used by Shia Muslims for religious ceremonies.