Pakistan Tehreek-e-Insaf (PTI) Chairman, Imran Khan has termed the Mastung bombing a conspiracy to delay the general elections 2018.

Speaking to the media persons during his visit to Quetta, the PTI chief said, "Pakistan's internal and external enemies are behind the Mastung attack."

A total of 131 people were killed after a suicide bomber struck Nawab Siraj Raisani's election meeting in Darenghar area of Mastung.

Terming Raisani an asset to his party and a diehard patriot, Imran said he realised the true scale of the Mastung tragedy after meeting the victims' families.

Imran criticised the lack of implementation of the National Action Plan for the continuation of terrorism in the country after 2014.

"We will not postpone elections since that is what the enemies want," he stated further. 

He then criticised the rampant corruption in the country and the role of the last federal government in allegedly rigging the 2013 general elections.

The PTI chief reached Quetta earlier today to express solidarity with the families of Mastung victims as the country observed a day of national mourning.

Imran, accompanied by party spokesperson Naeemul Haque and other members, visited CMH to inquire the health of those injured in the incident.

He later visited the Raisani family at their home to offer condolences.

Raisani, the brother of former Balochistan chief minister Nawab Aslam Raisani, was a Balochistan Awami Party (BAP) candidate from PB-35 constituency.

Over 100 people were also injured in the attack, 59 of which are still in hospital and five of whom have been shifted to Karachi via a military plane owing to their critical condition.

Investigations are under way into the attack, with an FIR registered on terrorism charges and Mastung Tehsildar Buland Khan assigned as the investigating officer.