The Islamabad Marriott Hotel bombing occurred on the night of 20 September 2008, when a dumper truck filled with explosives was detonated in front of the Marriott Hotel in the Pakistani capital Islamabad, killing at least 54 people, injuring at least 266 and leaving a 60 ft (20 m) wide, 20 ft (6 m) deep crater outside the hotel. The majority of the casualties were Pakistanis; at least five foreign nationals were also killed and fifteen others reported injured. The attack occurred only hours after President Asif Ali Zardari made his first speech to the Pakistani parliament.

The Marriott was the most prestigious hotel in the capital, and was located near government buildings, diplomatic missions, embassies and high commissions.During the investigation, three suspected terrorists were arrested by the Pakistani police. They were suspected of having facilitated the suicide bomber. However later they were acquitted of all charges as no evidence was ever presented against them.

A few months after the hotel's bombing the Government of Pakistan had re-constructed it, and the Islamabad Marriott reopened officially on 28 December 2008.

A dump truck, known also as a dumping truck, dump trailer, dumper trailer, dump lorry or dumper lorry or a dumper for short, is used for transporting materials (such as dirt, gravel, or demolition waste) for construction as well as coal. A typical dump truck is equipped with an open-box bed, which is hinged at the rear and equipped with hydraulic rams to lift the front, allowing the material in the bed to be deposited ("dumped") on the ground behind the truck at the site of delivery. In the UK, Australia, South Africa and India the term applies to off-road construction plants only and the road vehicle is known as a tip lorry, tipper lorry (UK, India), tipper truck, tip truck, tip trailer or tipper trailer or simply a tipper (Australia, New Zealand, South Africa).