Thousands of mourners gathered in Islamabad on Saturday to bury at least 32 victims of a suicide bombing at the Khadija Tul Kubra Shia mosque, Al Jazeera reported.

The Friday prayer attack, which injured 170 others, was claimed by ISIS (Daesh) and marks the deadliest blast in the capital since the 2008 Marriott Hotel bombing.

As authorities arrested three suspects in a Peshawar raid, the second such attack in three months has raised urgent fears regarding a resurgence of urban violence.

While Prime Minister Shehbaz Sharif and President Asif Ali Zardari pledged justice and national unity, the event has triggered a sharp diplomatic clash.

Pakistani officials, including Interior Minister Mohsin Naqvi and Defence Minister Khawaja Asif, accused India of sponsoring the attack through proxies and foreign funding, alleging the bomber had ties to Afghanistan.

India’s Ministry of External Affairs dismissed these claims as “baseless and pointless.”