for the pbs newshour, i'm coletta wanjohi in mekelle, northern ethiopia. >> woodruff: now, as colettated, the ethiopian government allowed journalists into tigray in part because of international pressure, following reports of atrocities committed by the government and its allies. nick schifrin is back, and begins with the anatomy of an event that amnesty international calls a possible crime against humanity. (gunfire) >> schifrin: in axum, ethiopia, gunshots broke the morning quiet, and didn't stop until the shooters committed a massacre. axum is in northern ethiopia, inside tigray, a town of 70,000 residents in 10 square miles. and the soldiers who arrived in november were from neighboring eritrea-- allies of the ethiopian government. they began by taking the high ground at mai ku-ho hill. a resident filmed black and white video of the local tigrayan militia, fighting back. >> the young people of axum, they were given a gun. i don't know by who, but they're fighting very amazing. >> the person describes fighting around the hill of mai koho. it's only a few hundred meters away from f