Three post office officials were detained on Monday on the charges of allegedly spying for Pakistan in Pokhran area of Rajasthan's Jaisalmer district.
The detentions were made by the Intelligence bureau and their questioning is underway.
Post master Kishan Pal, post inspector Vasudev Meghwal and computer operator Naresh Sharma were detained.
Pokhran is a vulnerable spot for terror activities as it is also located near Pakistan's border and a key component of India's nuclear programme is located there.
Further details awaited.
