Surprise raids were carried out by the Tihar jail staff on the inmates on Thursday.
Cell phones, knives and drugs were recovered from inmates of the jail.
The police have formed a committee to investigate the case.
Raids in Tihar, Mandoli jail last month
The Tihar personnel have conducted six raids in the last two months.
Earlier last month, police officials conducted raids on the prisoners in Tihar jail and Mandoli jail of the national capital and seized various materials.
Among the items seized were knives, room heaters, hand-made heaters, mobile phone chargers, pen drives and mobile phones.
The raids were conducted after police received input that the prisoners were in possession of dangerous commodities.
Several officials monitoring the jails were suspended.
