Authorities testing remains found in nine mass graves in southern Mexico have yet to find any of 43 students who disappeared after a confrontation with police.

A mass grave discovered on the outskirts of a Mexican city where police engaged in a deadly clash with student protesters a week ago contained 28 bodies, authorities have said.

A 6.7-magnitude earthquake struck Mexico’s western Guerrero state today, shaking buildings and causing panic just over 100 miles away in the nation’s capital.

At least 30 gunmen burst into a drug rehabilitation centre in a Mexican border state capital and opened fire, killing 19 men and wounding four people.