quetta pakistan gunmen southwestern pakistan kill four members shi ite muslim hazara family include 12-year-old boy sunday late sectarian attack minority community senior police official say two men motorcycle open fire family eight fill station 30 kilometres 19 miles north quetta capital pakistan baluchistan province aside kill two others wound two female members family unscathed remain vehicle sectarian attack senior police officer tanveer shah tell reuters add group claim responsibility shoot hazaras frequently target taliban islamic state militants sunni muslim militant group pakistan afghanistan many hazaras flee pakistan decades conflict neighbor afghanistan nearly half million live around quetta 2013 three separate bomb kill 200 people hazara neighborhoods raise international awareness plight community 20 hazaras kill similar shoot baluchistan past two years police say ongoing violence province fuel concern security project 57-billion china pakistan economic corridor transport energy link plan run western china pakistan southern deep-water port gwadar gunmen kill four sectarian attack pakistan