Iran says it transferred all inmates out of its notorious Evin prison after an Israeli strike targeted the facility on Monday.

Iran’s Prisons Organization said all the inmates had been moved to other prisons around the capital, Tehran. It said the move was necessary for workers to repair damage there.

Evin prison is known for holding both political prisoners and those with Western ties for negotiations with the wider world. It also has a specialized unit overseen by the paramilitary Revolutionary Guard.