The motives for the attacks in the rural province of Olancho are still under investigation. Drug traffickers have been active in the area.
The victims were aged 18 to 25.
Police commissioner Hector Garcia says the first attack occurred Saturday, and killed eight men.
The second attack Sunday killed two more men, and a third attack left one man dead.
All the attacks occurred around the city of Catacamas.
On Friday, gunmen killed the husband of the national Assistant Health Minister Miriam Paz in Olancho.
Security Minister Pompeyo Bonilla pledged to impose order in the violence-plagued province, and dispatched a contingent of police and soldiers to the area.