Bin Yamin said the explosion was apparently caused by a planted device as no body parts of a suicide bomber had been found. Police officials said five or six more persons were injured in the explosion.

UN officials and people in nearby buildings were asked to evacuate the area after the blast, which occurred at 12.15 pm local time. About 80 people worked in the WFP office.

Poll

Who will win the Punjab Elections?

BJP 32.86%

AAP 41.43%

INC 25.71%

Submit

View All In Poll

Smoke could be seen billowing out of the building after the blast. The WFP office, which was being guarded by a private security agency, and other UN organisations in Islamabad have been on high alert following intelligence reports that they could be targeted by militants.

Reports said the WFP office had received threats on three occasions but this could not be independently confirmed.