Islamabad completed in March 2015. The Rawalpindi Development Authority built the project at a cost of approximately Rs 24 billion, which was shared by both the Federal government and the provincial government of Punjab. Islamabad is located at at the northern edge of the Pothohar Plateau and at the foot of the Margalla Hills in Islamabad Capital Territory. Its elevation is . The modern capital and the ancient Gakhar city of Rawalpindi form a conurbation, and are commonly referred to as the Twin Cities. To the northeast of the city lies the colonial era hill station of Murree, and to the
Islamabad Marriott Hotel bombing 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. The hotel blast caused a severe natural gas leak that set the top floor of the