A suicide attack in Afghanistan Tuesday killed at least 12 people and ignited a nearby petrol station, officials said, with witnesses describing screaming victims "swallowed" by flames in the latest deadly violence to hit the country.
The bomber was targeting Afghan security forces when he blew himself up in the eastern city of Jalalabad, officials said.
Ten civilians were among the dead and least five people were wounded in the blast, the provincial governor's spokesman Attaullah Khogyani told AFP.
"I saw three people who had caught fire and were screaming," Ibrahim, who was sitting inside his shop at the time of the attack, told AFP.
"As I ran to help them, the fire swallowed them. I couldn't help them and I ran to save myself."
Some of the victims were brought to hospital with severe burns, health director Najibullah Kamawal said, confirming the casualty toll.
"I saw a big ball of fire that threw people away. The people were burning," Esmatullah, who witnessed the incident, told AFP.
Haji Ali Khan told AFP he counted at least eight cars alight and "seven people who had been burned in the fire".
Tolo News posted a video online showing several burned-out vehicles and gutted shops purportedly at the scene of the attack.
The Islamic State group claimed the attack via its Amaq propaganda agency -- the latest carried out by the extremists in restive Nangarhar province, which borders Pakistan.
IS has claimed a series of high-casualty suicide bomb attacks in the province in recent weeks, as US and Afghan forces continue offensive operations against the group.
While the Taliban is Afghanistan's largest militant group, IS has a relatively small but potent presence, mainly in the east and north of the country.
- Violence to continue -
Tuesday's attack comes a day after US Secretary of State Mike Pompeo expressed "hope" for peace talks between the Afghan government and Taliban, during an unannounced visit to Kabul.
Pompeo's first trip to Afghanistan since he was sworn in as America's top diplomat in April came amid renewed optimism for peace in the war-weary country, following last month's unprecedented ceasefire by the Taliban and Kabul during Eid.
The Islamic holiday was marked by spontaneous street celebrations involving Afghan security forces and Taliban militants, raising hopes peace was possible after 17 years of war.
"An element of the progress is the capacity that we now have to believe that there is now hope," Pompeo told a joint press conference with Afghan President Ashraf Ghani.
"Many of the Taliban now see that they can't win on the ground militarily," he said.
The ceasefire did not extend to the IS franchise in Afghanistan, which first emerged in the country in 2014 and established a stronghold in Nangarhar before spreading north.
The most recent major attack in Jalalabad on July 1 saw 19 people killed and 21 wounded when a suicide bomber blew himself up in a crowd of Afghan Sikhs and Hindus.
The group had been waiting to meet Ghani, who was visiting the city, when the bomber struck.
That came after two separate suicide attacks in Nangarhar during the ceasefire that were also claimed by IS.
Violence is expected to continue ahead of Afghanistan's long-delayed legislative elections on October 20 that militants have vowed to disrupt.
Afghan security forces, already struggling to beat back the Taliban and IS on the battlefield, will be responsible for protecting polling stations, many of which will be located in schools.
Map of Afghanistan locating Jalalabad, site of suicide attack Tuesday.
At least 12 people died when a suicide bomber blew himself up at a petrol station in Jalalabad, many others were injured