"At least three people were dead and 25 were injured in the ongoing clashes", Qaderi said.
The gunmen set off an explosives-packed auto near the prison before opening fire on security guards at the facility in the city of Jalalabad, Attaullah Khogyani, the spokesman for the governor of Nangarhar province, told AFP.
Khogiani also told Xinhua that the attack started after "a terrorist detonated a auto bomb at front gate of Nangarhar prison roughly at 06:30 p.m. local time Sunday in provincial capital Jalalabad city", destroying the front wall of the building, followed by gunfire between a group of assailants and prison guards.
But Ahmad Ali Hazarat, the head of Nangarhar provincial council, said that a "large number" of them had managed to escape. Islamic State militants opened fire on the prison's guards and poured through the breach.
The Taliban declared a three-day ceasefire starting on Friday for the major Muslim holiday of Eid al-Adha. Talks had been anticipated to start in March below a deal signed with the USA in February, however had been delayed as infighting over prisoner releases dragged on. Khyogyani said about 1,000 prisoners who earlier escaped had been found by security forces across the city.
He said 29 people had been killed so far, though the toll was expected to rise.
According to the NDS, Orakzai was involved in plotting deadly attacks on a number of military and civilian targets in Afghanistan.
President Ashraf Ghani and the Taliban have indicated that long-delayed peace negotiations could begin immediately after the Eid festival.
The attack occurred one day after Afghan special forces announced they had killed the intelligence chief of the Islamic State's Afghan headquarters in Jalalabad.
"Although in territorial retreat, [Daesh] remains capable of carrying out high-profile attacks in various parts of the country, including Kabul".
The report said the United Nations had recorded 17 attacks by IS that caused civilian casualties during the first six months of 2020, down from 97 attacks in the same period past year. The U.S. struck a peace deal with the Taliban in February.
In March, a lone Daesh gunman rampaged through a Sikh house of worship in the heart of the Afghan capital, killing 25 worshippers and wounding eight.
At least three bombs exploded outside a jail compound in the eastern Afghan city of Jalalabad on Sunday, officials said.