The official who declined to be named told Xinhua that the blast "obviously a suicide bombing" hit Mukhabirat square on Sunday afternoon killing at least "four people and injuring 10 others".
The victims have been taken to a hospital he added. Officials have yet to make a comment.
The blast rocked Jalalabad the capital of eastern Nangarhar province while Afghan President Mohammad Ashraf was there to hold a meeting with provincial officials elders and chieftains.
They were discussing ways and means on how to bolster the government-initiated peace process to encourage the Taliban outfit to initiate dialogue with the government to end the country s lingering crisis.
--IANS him/vd