Harban is about four kilometres from Tangier and Darail areas where security forces have been attacked for several times in recent past.
MPA Abdul Sattar Khan, who belongs to Dasso tehsil, said the carnage was apparently related to recent sectarian clashes in Gilgit.
Senior officials of the Kohistan district administration were tight lipped about the nature of the killings.
“We have registered an FIR and started investigation and everything will be clear after completion of preliminary investigation,” Mr Ilyas said.
Farman Ali Baltistani adds from Skardu: Seven victims were from Baltistan division, four from Nagar, two from Astore and one from Gilgit. The bodies of the other two could not be identified.
A large number of people came out on roads in protest against the killings. They burned tyres at different chowks. Shops and markets were closed. The district administration imposed Section 144 in Gilgit city and announced closure of offices and schools for three days.
Protesters took out a procession from Imamia Jamia Mosque in Skardu and marched up to Yadgar-i-Shuhada Baltistan.
Meanwhile, two people were injured in incidents of firing in Sakwar village. They were identified as Zulfiqar and Abdul Mannan, residents of Gilgit.
President Asif Ali Zardari took notice of the incident and summoned a detailed report within three days.