QUETTA, Pakistan: A string of bombings in Pakistan including a twin suicide attack on a snooker hall used by Shiite Muslims has left 115 people dead, in one of the nation’s deadliest days in years.

At least 82 people were killed and 121 wounded when two suicide bombers blew themselves up at the crowded snooker club in an area of the southwestern city of Quetta dominated by the Shiite community, a police officer said.

Extremist Sunni militant group Lashkar-e-Jhangvi claimed responsibility for what was the worst single attack ever on the minority community, which accounts for around 20 percent of Pakistan’s 180 million-strong population.

It was also the deadliest attack in Pakistan since twin suicide bombers killed 98 people outside a police training center in the northwestern town of Shabqadar on May 13, 2011 shortly after US troops killed Osama bin Laden.

Earlier Thursday, a bomb detonated under a security forces’ vehicle in a crowded part of Quetta, killing 11 people and wounding dozens more.

In a third incident, a bomb exploded at a religious gathering in the northwestern Swat valley, killing 22 people and wounding more than 80, in the deadliest incident in the district since the army in 2009 fought off a two-year Taliban insurgency.

At the snooker club the first suicide bomber struck inside the building, then 10 minutes later an attacker in a car outside blew himself up as police, media workers and rescue teams rushed to the site, said officer Mir Zubair Mehmood.

Akbar Hussain Durrani, home secretary in the provincial government of Baluchistan, said that the death toll had risen to 82 with more than 120 wounded. Nine police personnel, three local journalists and several rescue workers were among those killed.

The snooker club was frequented mostly by Shiites, police said.

Lashkar-e-Jhangvi has links to al-Qaeda and the Taliban, and was among several involved in the kidnap and beheading of reporter Daniel Pearl in January 2002.

The US-based Human Rights Watch called the government’s failure to protect the Shiite community, which accounts for some 20 percent of the population, “reprehensible and amounts to complicity in the barbaric slaughter of Pakistani citizens.” It said 2012 was the deadliest year on record for Shiites in Pakistan.

The bombings damaged several shops and nearby buildings. At least four local ambulance service vehicles were destroyed and people were seen wailing beside bodies lying on the ground.

Quetta has long been a flashpoint for attacks against Shiites, in particular those from the ethnic Hazara minority, as well as suffering from attacks linked to a separatist insurgency and Islamist militancy.

The blast in the northwestern Swat valley took place at a weekly meeting of the local Tableeghi Jamaat (preachers’ party) at its center on the outskirts of Mingora, the main town in the district, regional police chief Akhtar Hayat said.

“The explosion occurred due to a bomb. Around five kilograms of explosives were used in the blast,” said Shafqat Malik, a senior bomb disposal official.

Initial reports had said the blast was caused by a gas cylinder exploding.

In the earlier attack in Quetta, bombers targeted Frontier Corps (FC) personnel, planting a device underneath one of their vehicles, a senior police investigator said.

The worst single attack in Pakistan killed 139 people in Karachi on October 19, 2007, at the homecoming of former prime minister Benazir Bhutto.

On October 28, a car bomb destroyed a clothing market in the northwestern city of Peshawar, killing 134 people.