Ahmad Zia Abdulzai, spokesman for the provincial governor in Nangarhar province, said on Saturday that more than 80 people were also wounded in the attack in Jalalabad, the provincial capital.
"There are reports of many wounded people in critical condition at the hospital," Abdulzai said.
The attacker detonated an explosive-laden motorcycle, targeting a crowd of both military personnel and civilians who were gathered outside the bank to receive their monthly salaries. The bank branch is located in the heart of a crowded commercial district, Abdulzai said.
Another blast was reported Saturday near a shrine in Jalalabad, but no one was hurt. A third blast was also heard in Jalalabad, but it was later reported as a controlled explosion by the Afghan army in Nangarhar, Abdulzai said.
No group has claimed responsibility for the attack.
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