Gunmen opened fire on a bus in the capital of Pakistan’s volatile Baluchistan province on Thursday, killing eight Shiite Muslims from the ethnic Hazara minority community.

Police say four assailants on motorcycles targeted the men, who were coming from a vegetable market in Quetta.

No one has claimed responsibility for the attack, but deadly violence against the Hazara is frequent in the country. 

A suicide attacker killed at least four people in a predominantly Shiite area of Quetta in early October. 

Human Rights Watch documented at least 450 killings of Shiites in Pakistan in 2012, and at least another 400 last year. 
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