A massive truck bomb exploded Wednesday morning in the diplomatic section of Afghanistan's capital, killing at least 90 people and wounding more than 400 others.
The bomb ripped through the central Wazir Akbar Khan area of Kabul, home to foreign diplomatic missions and government offices, damaging dozens of vehicles and surrounding buildings. Afghan officials said the explosives were packed in a sewage tanker.
Most of the casualties were civilians, but the dead included Afghan security guards at diplomatic sites.
There was no claim of responsibility for the attack.
The Afghan Intelligence agency, NDS, in a brief statement, has blamed the Haqqani network, which allegedly is based in neighboring Pakistan and fighting alongside the Taliban. The NDS also asserted that Pakistan's spy agency, ISI, helped in planning the attack.
Afghan officials have blamed Islamabad previously for facilitating insurgent attacks in their country, charges Pakistani officials deny.
The Taliban has denied involvement, saying the insurgent group has nothing to do with Wednesday's bombing or any attacks that target civilians. The insurgents have lately intensified attacks on Afghan security forces, killing and wounding scores of them.
Islamic State has claimed attacks against high-profile Afghan targets in recent months, including a deadly suicide raid on the country's largest military hospital in Kabul in March.