Afghan Voice Agency (AVA)_Monitoring, Farid Dehqan, the spokesman of the Kunar police, said that the explosion occurred at around 11:00 AM in a house in Trink area of Chapa Dara district.
The injured people were taken to hospital, he said.
Dehqan added that security forces cordoned off the scene of the blast and launched an investigation into the incident.
It comes nearly three hours after a clash erupted between Afghan and Pakistani forces in Kunar province.
According to sources, the clash started at 8:30 AM in Sapri area of Ganjgal valley in Sarkano district.