Afghan police stand guard at the site of rocket attack in the city of Kabul, during Independence Day celebrations at Defense Ministry in Kabul, Afghanistan, Tuesday, Aug. 18, 2020, Several mortar shells slammed into various part of Kabul on Tuesday morning as Afghans marked their country's Independence Day amid new uncertainties over the start of talks between the Taliban and the Kabul government. (AP Photo/Mariam Zuhaib)

KABUL - An upstart Islamic State group affiliate claimed responsibility for a mortar attack in Kabul on Tuesday morning that wounded at least 10 civilians as Afghans marked their country’s Independence Day. The attack came amid new uncertainties over the start of talks between the Taliban and the Kabul government.

According to the SITE Intelligence Group, which tracks militant groups' online activity, said IS in a “communique” claimed credit for the firing of 16 mortar shells, which targeted the presidential palace, embassies and Afghan government offices.

The Interior Ministry’s spokesman, Tariq Arian, said a total of 14 mortar shells were fired from two vehicles in the northern and eastern part of the Afghan capital. Four children were among the wounded.

“Most of the mortar shells hit residential houses,” Arian said, adding that an investigation is underway.

According to eyewitnesses, who spoke on condition of anonymity fearing reprisals, at least one mortar shell landed in the upscale Wazir Akbar Khan neighbourhood, where diplomats and senior government officials reside.

Also on Tuesday, Afghanistan's intelligence agency said it killed the IS chief justice Abdullah Orakzai in a “complex and targeted operation," without elaborating.

The statement said Orakzai had orchestrated a prison break earlier this month in eastern Nangarhar province that killed at least 39 people. Nearly 400 IS militants escaped in the first hours of the attack.

The mortar attack in Kabul came a day after the government said it would not release the last 320 Taliban prisoners it holds until the insurgents free more captured Afghan soldiers. The decision went against that of a traditional Afghan council held earlier this month — the Loya Jirga — and is likely to further delay intra-Afghan peace talks sought by the United States.

Taliban spokesman Zabihullah Mujahid said he wasn't aware of the mortar attack in Kabul. The Islamic State group's affiliate, which operates in Afghanistan, has interrupted national celebrations in the past with rocket fire.

Also on Tuesday morning, Afghan President Ashraf Ghani attended an Independence Day ceremony at the Defence Ministry in Kabul, inspecting an honour guard and laying flowers on the Independence Minaret monument there.

News from © The Associated Press, 2020