The attacks form part of a decades-long effort to win secession of the resource-rich southwestern province, home to major China-led projects such as a strategic port and a gold and copper mine.
"These attacks are a well thought out plan to create anarchy in Pakistan," Interior Minister Mohsin Naqvi said in a statement, adding that security forces had killed 12 militants in operations after the attacks, but without giving details.
The largest of the attacks targeted vehicles from buses to goods trucks on a major highway, killing at least 23 people, officials said, with 35 vehicles set ablaze.
Rail traffic with Quetta was suspended following blasts on a rail bridge linking the provincial capital to the rest of Pakistan, as well as on a rail link to neighbouring Iran, railways official Muhammad Kashif said.
Police said they had found six as yet unidentified bodies near the site of the attack on the railway bridge.
Pakistani Interior Minister Mohsin Naqvi condemned the deadly attack on a major highway. (EPA PHOTO)
Interior Minister Mohsin Naqvi called the attack "barbaric" and vowed that those who were behind it would not escape justice.
Militants also targeted police and security stations in the sprawling province, officials said, one of which killed at least 10 people.
Militant group the Balochistan Liberation Army (BLA) took responsibility in a statement emailed to journalists that claimed many more attacks, including one on a major paramilitary base, though Pakistani authorities have yet to confirm these.
On Sunday night, armed men blocked a highway in Balochistan, Pakistan's largest province, marched passengers off the vehicles, and shot them after checking their identity cards, a senior superintendent of police, Ayub Achakzai, told Reuters.
"The armed men also not only killed passengers but also killed the drivers of trucks carrying coal," said Hameed Zahir, the deputy commissioner of the area, adding that at least 10 trucks had been set on fire after their drivers were killed.
Militants have targeted workers from the eastern province of Punjab whom they see as exploiting their resources. In the past, they have also targeted Chinese interests and citizens operating in the province.
Workers shift the bodies of victims in Balochistan province. (EPA PHOTO)
In the past, they have also attacked Chinese interests and citizens in the province, where China runs the strategic southern deepwater port of Gawadar, as well as a gold and copper mine in its west.
The BLA said its fighters had targeted military personnel travelling in civilian clothes, who were shot after being identified.
Pakistan's interior ministry said the dead were innocent citizens.
Six security personnel, three civilians and one tribal elder made up the 10 killed in clashes with armed militants who stormed a station of the Balochistan Levies in the central district of Kalat, police official Dostain Khan Dashti said.
Officials said police stations had also been attacked in the two southern coastal towns, but the toll had yet to be confirmed.
The office of Prime Minister Shehbaz Sharif condemned the attacks, vowing that security forces would retaliate and bring those responsible to justice.
Balochistan, which borders both Iran and Afghanistan, is Pakistan's largest province by size, but the least populated and it remains largely underdeveloped, with high levels of poverty.
with Reuters
