The victims were playing cards yesterday when the two gunmen shot at them and escaped, the police commissioner for Gombe state Mohammed Sule said.
The assailants were two in number, he said, adding that the incident took place in Bagadaza neighbourhood of the state capital Gombe city.
Gombe is close to Maiduguri, a stronghold of terror group Boko Haram and has witnessed series of attacks.
The sect has killed thousands of people since it waged a war against the Nigerian state in 2009 in an attempt to establish an Islamic caliphate in the country.