BAHAWALPUR: At least four suspects, including a woman, were arrested from southern Punjab's Hasilpur area in connection with Tuesday's carnage in Peshawar that claimed the lives of more than 140 people, DawnNews reported.

The four were tracked through a mobile SIM which was reportedly used by terrorists during the attack on the military-run Army Public School. The SIM was registered in the name of the woman who was taken into custody along with three others from Gharibabad area of Hasilpur, a city in the district of Bahawalpur.

A local mobile franchise dealer was also included in the scope of investigations.

Read: Militant siege of Peshawar school ends, 141 killed

The arrests come days after the attack claimed the lives of over 140 people and drew condemnation from various quarters nationally and internationally.

Earlier on Thursday, Inspector General (IG) Police Khyber Pakhtunkhwa Nasir Durrani had said that the team constituted to investigate the attack was currently working on the available evidence.

He had that the team had a forensic lab at its disposal and replete with crime scene investigation officers who were helping to obtain and preserve evidence from the scene and analyse it.

Durrani had also said that leads coming from initial investigation of the school massacre extended beyond the country's border.

Also read: KP police chief vows thorough investigation of Peshawar attack

Dawn's report on the Peshawar attack had quoted a senior military official as saying that militants had been in direct communication with their handler in Afghanistan, Umar Naray, alias Umar Khalifa Adinzai – a well-known commander of the TTP’s Tariq Geedar group. “He was directing the suicide bombers and the attack group,” the official had said.