At least 55 people were killed in two explosions in the north-western Pakistan town of Parachinar.
On March 31, a suicide bomber targeted civilians in the same city, killing at least 23 people and wounding 80 others.
While no group claimed responsibility for the twin attacks in Parachinar, two groups said they had carried out the suicide auto bombing in Quetta. 13 were killed, including at least seven police, in that attack.
Hours later twin bombings, minutes apart, hit a crowded market in a Shiite-dominated city in Parachinar, the main city in the Kurram tribal region and killed 24 people, mostly minority Shiite Muslims, according to government administrator Zahid Hussain.
The first blast took place at Turi Market while the second explosion occurred when rescuers and bystanders rushed to help the survivors of the first blast, reports the Express Tribune.
The death toll from a series of terrorist attacks in Parachinar, Quetta and Karachi in Pakistan Friday, has risen to 85 people, with a dozen of critically injured dying in hospitals overnight. Later Friday, the IS group said in a competing claim that it was behind the attack, adding that one of its followers targeted the police post in Quetta, detonating his suicide belt there.
RFE/RL's correspondent in Parachinar says that all markets and shops were closed on June 24 in a protest of authorities' failure to provide security.
The emergency and rescue services shifted injured to Agency Headquarters hospital Parachinar.
That was not the only incident targeting Muslims in Pakistan on Friday as four police officers were shot dead while observing iftar in Karachi, Pakistan's largest city and financial capital.
An assistant sub-inspector was among those killed in the attack, said Superintendent of Police Asif Ahmad.
Pentagon also added "Although Pakistani military operations have disrupted some militant sanctuaries, certain extremist groups-such as the Taliban and the Haqqani Network-were able to relocate and continue to operate in and from Pakistan".
"Special Intelligence-Based Operation (IBOs) and search operations (were) launched in coordination with intelligence and other Law Enforcement Agencies", he said.
UN Secretary-General Antonio Guterres has condemned the terrorist attacks in Pakistan and called for bringing the perpetrators to justice.
He said the militants were making bombs that likely would have been used to target holiday festivities.
Kakar blamed India for the Quetta blast.
He said the nature of the blast is yet to be determined.
An official from Baluchistan's bomb disposal unit said the vehicle contained up to 95kg of explosives.
Police were targeted in an earlier auto bomb attack in the capital of Baluchistan province, Quetta.
More casualties were reported in Parachinar where 50 people were killed.
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