Associated Press Writers Rasool Dawar in Peshawar and Abdul Sattar in Quetta contributed to this report.
The route includes stopovers in Quetta, near the Afghan border, and in the Iranian capital, Tehran.
He was picked up by Pakistani police in Quetta in August 2011 and remains in detention.
Many have been living a precarious existence in old refugee camps or in Peshawar, Quetta and other cities.
Arrivals have reached the Quetta area from Kandahar, Kabul and southwest rural areas.
UNHCR's planning team expects to visit potential camp sites in the Quetta area.
Among the dead was Quetta-based rights activist, Irfan Ali, who was reportedly helping those wounded in the first blast.
According to reports, 80 students study in two-hour shifts in a single classroom in Quetta, with lessons taught in Persian.
Afghan investigators say the killer was a Pakistani and that the murder was plotted in the Pakistani city of Quetta.
He was abducted in Quetta, in Pakistan, on 5 January last year and found dead on a roadside months later.
At the main hospital in Quetta, Dr Shamim Gul said only one of the injured was brought there for treatment.
Such violence is a common problem in the volatile Khyber Pakhtunkhwa province, which, like Quetta's home province of Balochistan, borders Afghanistan.
The British Foreign and Commonwealth Office has advised British nationals against all travel to Iran and all but essential travel to Quetta.
Following talks with Shia representatives from Quetta, Pakistan's Prime Minister Raja Pervez Ashraf sacked Balochistan's chief minister and promised them better security.
Karachi, meanwhile, is some 1, 350 kilometers (840 miles) south of Hangu and 800 kilometers (about 500 miles) from Quetta on Pakistan's southern coast.
But the Haqqani network appears to recognise the Taliban leadership, based in the Pakistani city of Quetta, as the authority guiding the insurgency.
Several thousand people turned out Friday at demonstrations in Peshawar, Islamabad, Quetta and Lahore following services at mosques on the Muslim day of prayer.
Between 10, 000 and 20, 000 Afghans estimated to be waiting at the Chaman border crossing near Quetta reportedly have left that area and retreated into Afghanistan.
The road journey from Mashkel to Zahidan takes a few hours, compared with the 15 to 18 hours it takes to reach Balochistan's capital, Quetta.
BBC: The remote corner of Pakistan flattened by an earthquake
World Teachers' Day was celebrated by Directorate of Schools in collaboration with UNESCO and Save The Children in a simple but graceful manner at Quetta.
The frail-looking, soft-spoken 70-year-old, who is now a teacher at the music academy, recounted having to flee overnight to Quetta, Pakistan, fearing for his life.
Washington will also want Pakistan to root out the Afghan Talibs who launch attacks against Afghanistan from camps in Waziristan and around the southwestern city of Quetta.
They also note the ISI's longstanding ties to the Afghan Taliban, including its leader, Mullah Omar, who is assumed to be operating out of Quetta in Baluchistan.
This week, Afghanistan produced a video of a captured Taliban spokesman, alleging that the group's leader, Mullah Omar, was under Pakistani protection in the city of Quetta.
Tremors were felt in southern Pakistan, including the city of Karachi, and across Balochistan province from Gwadar on the southern coast to Quetta and the border with Iran.
Shiite Muslims, including Hazaras, have often been targeted by Sunni extremists in the province of Baluchistan where Quetta is the capital, the southern city of Karachi and northwestern Pakistan.
When the editor of a Dubai newspaper sent a reporter to Quetta to cover the war in Afghanistan, he found it faster and cheaper to send expenses money through hawala.
ECONOMIST: A worldwide attempt to stop finance for terrorists
Tension had been rising at the Chaman crossing, 100 kilometres (60 miles) north of Quetta, as Pakistani guards only allowed those with identity papers or able to pay bribes to pass.
Pakistani has seen several such deadly attacks in recent years, including one last month that struck a crowded marketplace on the outskirts of Quetta that killed at least 89 people and wounded at least 180 others.
Associated Press writers Munir Ahmed and Zarar Khan in Islamabad, Atif Raza in Karachi, Riaz Khan in Peshawar, Rasool Dawar in Mir Ali, Anwarullah Khan in Khar, Abdul Sattar in Quetta, Matiullah Achakzai in Chaman, and Asif Shahzad in Lahore contributed to this report.
应用推荐