ISIS claims responsibility for the bombing. ISIS's Amaq site said Saturday's attack targeted Afghan troops in Nangarhar. But they gave no details.
The spokesman for Nangarhar province governor Attaullah Khogyani said the attack took place in Rodat district, about 25 km from Jalalabad. The suicide bomb also wounded more than 54 people.
Jennifer Glasse from Al Jazeera described the bombing as a very damaging blow in the middle of an unprecedented meeting between the Taliban and Afghan security forces in Jalalabad. The attack came as Afghan President Ashraf Ghani announced an extension of a ceasefire with the Taliban without giving the term.
In a speech broadcast on television Ghani called for the Taliban to extend the ceasefire, which will end on Sunday after the two sides agreed to stop hostilities during Eid al-Fitr.
Ghani said, in the spirit of Eid al-Fitr and the truce, the Prosecutor General's Office has released 46 Taliban prisoners. While the Taliban announced a ceasefire for the first three days of Eid, which began on Friday, promising not to attack Afghan security forces for the first time since the 2001 US invasion.
Security forces, Ghani said, will temporarily suspend operations against the Taliban for eight days, starting last Tuesday. Although he warned against other militants, including ISIS.
In his speech, Ghani touched on the subject of regional influence and international forces in Afghanistan. "The Afghan government is ready to discuss the role of neighboring countries and the presence of international forces, their role and their future fate," he said.
US Secretary of State Mike Pompeo said it supported President Ghani's offer to extend the truce and start peace talks. "Peace talks include a discussion of the role of actors and international forces. The United States is ready to support, facilitate, and participate in this discussion. "