ISLAMABAD, April 20 (Reuters) – A Pakistani airliner with 127 people on board crashed in bad weather as it came in to land in Islamabad on Friday, scattering wreckage and leaving no sign of survivors.

The Boeing 737, operated by local airline Bhoja Air, was flying to the capital from Pakistan’s biggest city and business hub Karachi. It crashed more than five miles (nine km) from the international airport.

Aviation official Pervez George gave no details of casualties.

But rescue workers at the crash site said there was no chance of finding survivors.

Body parts lay among wreckage strewn in a small settlement just outside Islamabad.

Residents said they had seen a ball of fire in the sky when the plane crashed. Parts of the plane smashed into electricity poles, blanketing the area in darkness.

Officials gave no immediate indication as to why they thought the plane had crashed.

ISLAMABAD (Reuters) – Pakistan’s Prime Minister Yusuf Raza Gilani will meet with U.S. President Barack Obama on March 27 on the sidelines of a nuclear security summit in Seoul, the prime minister’s office said on Friday.

Relations between the two uneasy allies have been frayed after the discovery and killing of al Qaeda chief Osama bin Laden in a Pakistani military town in May 2011 just two hours from Islamabad. Pakistan called that a violation of its sovereignty.

Ties plunged to a new low in November when NATO aircraft mistakenly attacked two Pakistani border posts and killed 24 Pakistani soldiers.

Details on the agenda for the Seoul talks were sketchy, but spokesman Akram Shaheedi said they would touch on issues of importance to both sides.

The Seoul summit will focus on measures to protect nuclear materials and facilities from militants and to prevent their illicit trafficking. Pakistan’s nuclear weapons and their security are likely to be discussed.

Pakistan’s is the fastest growing nuclear arsenal in the world, with the Bulletin of the Atomic Scientists estimating that it could number between 150-200 warheads in a decade, making its arsenal larger than Britain’s.

The unstable south Asian country has been the lone hold-out on starting talks leading to a treaty that would prevent the further production of fissile materials for nuclear weapons. It cites concerns that it would be left at a disadvantage against traditional rival India, which has its own nuclear arsenal.