Parents of boy accused of killing 10 in Belgrade school shooting go on trial

Mother and father of teenager are accused of failing to safeguard weapon and ammunition used in massacre

The parents of a 13-year-old accused of killing 10 people in a school shooting in Serbia last year have gone on trial for allegedly failing to safeguard the weapon and ammunition used in the attack.

The massacre last May - and a second mass shooting a day later - rocked the Balkan nation, setting off major anti-government demonstrations that led to the formation of an opposition coalition that stood in recent elections.