PESHAWAR, Pakistan — At least 32 people were killed and 47 others were wounded in sectarian clashes in northwestern Pakistan, an official told Agence France-Presse (AFP) on Saturday, two days after attacks on Shiite passenger convoys killed 43.

Sporadic fighting between Sunni and Shiite Muslims in the mountainous Khyber Pakhtunkhwa province bordering Afghanistan has killed about 150 over the past several months.

"Fighting between Shiite and Sunni communities continues at multiple locations. According to the latest reports, 32 people have been killed, [of which] 14 [are] Sunnis and 18 [are] Shiites," a senior administrative official told AFP on condition of anonymity on Saturday.

On Thursday, gunmen opened fire on two separate convoys of Shiite Muslims traveling with police escort in the province's Kurram district, killing 43 while 11 wounded are still in "critical condition," officials told AFP.

In retaliation, Shiite Muslims on Friday evening attacked several Sunni locations in Kurram, once a semi-autonomous region, where sectarian violence has resulted in the deaths of hundreds over the years.

"[At about] 7 p.m., a group of enraged Shiite individuals attacked the Sunni-dominated Bagan Bazaar," a senior police officer stationed in Kurram told AFP.

"After firing, they set the entire market ablaze and entered nearby homes, pouring petrol and setting them on fire. Initial reports suggest over 300 shops and more than 100 houses have been burned," he said.

Local Sunnis "also fired back at the attackers," he added.

Javedullah Mehsud, a senior official in Kurram, said there were "efforts to restore peace... [through] the deployment of security forces" and with the help of "local elders."

After Thursday's attacks that killed 43, including seven women and three children, thousands of Shiite Muslims took to the streets in various cities of Pakistan on Friday.

Several hundred people demonstrated in Lahore, Pakistan's second-largest city, and commercial hub Karachi.

In Parachinar, Kurram's main town, thousands participated in a sit-in, while hundreds attended the funerals of the victims, mainly Shiite civilians.

Tribal and family feuds are common in Sunni-majority Pakistan, where the Shiite community has long suffered discrimination and violence.

The latest violence drew condemnation from officials and human rights groups.

The independent Human Rights Commission of Pakistan (HRCP) urged authorities this month to pay "urgent attention" to the "alarming frequency of clashes" in the region, warning that the situation has escalated to "the proportions of a humanitarian crisis."

"The fact that local rival groups clearly have access to heavy weaponry indicates that the state has been unable to control the flow of arms into the region," the HRCP said in a statement.

Last month, at least 16 people, including three women and two children, were killed in a sectarian clash in the district.

Previous clashes in July and September killed dozens of people and ended only after a jirga, or tribal council, called a ceasefire. The HRCP said 79 people died between July and October in sectarian violence.

These clashes and attacks come just days after at least 20 soldiers were killed in separate incidents in the province.