What Is Next After the Suicide Attack in Pakistan

Critical Questions by Alexander Palmer and Alexander Margolis

Published February 6, 2026

The morning of February 6, a suicide bomber attacked a Shia mosque in Islamabad, Pakistan. The attack risks worsening regional instability amid a deteriorating security situation in Pakistan.

Q1: What is known so far?

A1: Early reports suggest the attack was carried out by a single actor, who opened fire at security personnel outside a mosque before entering and detonating a suicide vest. In an official statement, Islamabad's deputy commissioner announced that 31 people had been killed, with another 169 people hospitalized locally, but the death toll is likely to rise.

Based on current information, the attack was the deadliest terrorist attack in Islamabad since the 2008 Marriott hotel bombing, and only the second since 2022. It follows a November 2025 attack outside of a courthouse that killed 12 and injured 27.

However, accurate information is often scarce after an attack, and new information may emerge over the next few hours or days, changing the assessment.

Q2: Who may be responsible for the attack?

A2: No group has yet claimed the attack. Pakistan is home to an enormous variety of terrorist organizations: U.S. officials have identified at least 15 groups, while the Indian nonprofit South Asian Terrorism Portal has listed 44 terrorist organizations operating in the country. Most terrorist violence in Pakistan is associated with three actors: the Islamic State, Baloch militants, and Tehreek-e-Taliban Pakistan (TTP).

The most likely perpetrator appears to be the Islamic State-⁠Khorasan Province (IS-KP), which operates both in Afghanistan and Pakistan but has a significant interest in mass-casualty international attacks. The group has been implicated in a variety of recent international attacks and plots, including mass-casualty attacks against Crocus City Hall in Moscow and a memorial for Iranian General Qasem Soleimani in Tehran, and plots against the Paris Olympics, cathedrals in Cologne and Vienna, and protests outside of the Swedish parliament.

The sectarian nature of the target points toward IS-KP. The group has eagerly embraced sectarian violence, while other Pakistani militants have sought to distance themselves from such forms of violence. While the TTP has conducted attacks against sectarian targets in the past, it has taken steps to distance itself from such attacks in recent years as it sought to position itself as a viable alternative to the Pakistani government. Most Baloch militant attacks target Pakistani security forces or Pakistani and Chinese workers in Balochistan.

Two factors complicate this assessment. The first is that membership in militant groups is fluid, and the central leadership often exerts incomplete control. For example, a TTP faction claimed the 2025 Islamabad attack, but TTP leadership denied the claim. The second is that local security officials believe the Shia mosque was chosen because other harder targets closer to the city center were inaccessible, due in part to increased security associated with an official visit by the president of Uzbekistan to Islamabad. The mosque may therefore have been targeted for opportunistic rather than sectarian reasons.

Q3: What are the possible implications and responses?

A3: Pakistan has several military options on the table, some of which involve the prospect of regional escalation.

The most serious scenario-escalation between India and Pakistan-is extremely unlikely despite regular Pakistani claims that New Delhi supports IS-KP and the TTP. Although India conducted strikes against Pakistan in response to an April 2025 terrorist attack, Pakistan does not have a history of conducting conventional strikes against India in retaliation for Islamic State or TTP attacks. In contrast, India has declared that it will respond to Pakistan-linked terrorist attacks with military action. Avoiding all-out war between the two nuclear-armed states is also a vital U.S. interest, and diplomats will be working to prevent escalation.

More likely is renewed conflict between Pakistan and Afghanistan. Whether the Islamic State or the TTP eventually claims the attack, the Pakistani military will consider strikes in Afghanistan. Although the Taliban condemned the attack, both IS-KP and the TTP operate on the Afghan side of the Durand Line, as the Afghanistan-Pakistan border is known. Pakistan has targeted the TTP in Afghanistan with increasing frequency since 2022. The attack occurred against the backdrop of frequent clashes along the Durand Line, which the Taliban-led government in Afghanistan does not recognize.

While conflict between Afghanistan and Pakistan poses a far lower escalation risk between nuclear-armed Pakistan and India, the regional instability created by the Pakistan-Taliban conflict provides international terrorist groups like IS-KP room to operate and increases the global terrorist threat.

Pakistan might also respond with large-scale military action within its borders. In early February, Pakistan conducted a week-long operation in Balochistan in response to a series of coordinated attacks by the Baloch Liberation Army. There are also indications (in the form of mass evacuations) of an impending military operation in the Tirah Valley, a long-time hotbed of TTP activity, although evacuations preceded the February 6 attack.

Even if the Pakistani response remains limited to Pakistan, however, the consequences may not remain in Pakistan. IS-KP formed partly as a result of large-scale military operations in Pakistan, which displaced militants from Pakistan to Afghanistan.

No matter the Pakistani response, terrorist violence is almost certain to continue at high rates in Pakistan. Pakistan is one of the most terrorism-affected countries in the world, and the situation has been consistently deteriorating for several years. In its counterterrorism operations, the Pakistani government has largely abandoned community engagement, a core component of effective counterterrorism.

Alexander Palmer is a fellow in the Warfare, Irregular Threats, and Terrorism (WITT) Program at the Center for Strategic and International Studies in Washington, D.C. Alexander Margolis is an intern with the WITT Program at CSIS.

Special thanks to Madison Bruno for editing and publication support.

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