5,000 Detained in Delhi: What Indian Law Actually Says About Preventive Detention

The story so far: More than 5,000 people, including activists and students, were detained by the Delhi Police as they attempted to reach Jantar Mantar for a protest demanding the resignation of Chief Election Commissioner Gyanesh Kumar and a rollback of the SIR.

According to accounts of the events, those detained included leaders of several political parties, former Chief Ministers, the Leader of the Opposition, lawyers and journalists, as well as people who say they were not part of the protest. Detentions were reportedly carried out at the residences of some public representatives before the protest began, and at points along the route to the protest site. Some of those held have alleged rough handling by the police.

On Sunday (October 11, 2026), the Supreme Court directed the Centre and the Delhi Police to ensure the free movement of people, “subject to law and order”.

The events have renewed public discussion about preventive detention — what it is, when it can be used, and how it has evolved in India.

What is preventive detention?

Preventive detention means holding a person without trial or conviction by a court. Its objective is not to punish a person for a past offence but to prevent them from committing an offence in the future. Authorities may invoke it on grounds related to public order, the security of the state, and law and order.

The National Security Act, 1980, permits preventive detention where the government is satisfied that a person’s activities are prejudicial to the defence of India, India’s relations with foreign powers, or the security of the state.

Such detention is an exception to the ordinary criminal law framework. Article 22 of the Constitution provides safeguards — including that a detainee be informed of the grounds of detention and given the earliest opportunity to make a representation — but clauses (1) and (2) of the Article, which guarantee the right to consult a lawyer and to be produced before a magistrate, do not apply to preventive detention.

What is a prohibitory order under the BNSS?

Section 163 of the Bharatiya Nagarik Suraksha Sanhita largely retains the spirit of Section 144 of the Code of Criminal Procedure, 1973. It empowers a District Magistrate, a Sub-Divisional Magistrate, or another Executive Magistrate specially empowered by the State Government to issue orders when there is sufficient ground for proceeding and immediate prevention or a speedy remedy is desirable.

The aim is to prevent obstruction, annoyance or injury to any person lawfully employed, danger to human life, health or safety, or a disturbance of public tranquillity, a riot or an affray. The provision is preventive in nature, designed to avert potential harm rather than punish past acts. The Magistrate must be satisfied that urgency requires an immediate order, even without prior notice to those affected.

This power is extraordinary and is meant for situations where ordinary enforcement may be too slow to prevent immediate harm. The order must state the material facts on which it is based, so that it can be examined and challenged.

Orders under Section 163 are subject to judicial review by the High Courts under their revisional jurisdiction (Section 401 BNSS) or writ jurisdiction (Articles 226 and 227). In Babulal Parate v. State of Maharashtra (1961) and Madhu Limaye v. Sub-Divisional Magistrate (1971), the Supreme Court held that such powers must be exercised judiciously and proportionately, only when there is an imminent threat to public order, and not as a routine measure.

How has preventive detention evolved?

Preventive detention in India evolved from a colonial tool used to suppress political dissent into a legal mechanism intended to protect national security and public order. Under British rule, laws such as the Rowlatt Act, 1919, and the Defence of India Act, 1939, allowed authorities to detain individuals without trial, often targeting freedom fighters and political opponents.

After Independence, India retained the power, introducing the Preventive Detention Act, 1950, which remained in force until 1969. Later laws, including the Maintenance of Internal Security Act, 1971, and the National Security Act, 1980, continued the framework. The 44th Constitutional Amendment, 1978, and judgments such as Maneka Gandhi v. Union of India (1978) strengthened procedural safeguards, holding that detention must follow a fair and just procedure.

Critics argue that such laws give the executive wide discretion with limited judicial scrutiny before detention; supporters say they are necessary to prevent harm that ordinary criminal procedure may not address in time. As the Delhi detentions show, that debate remains live.