Serbia is holding a national day of mourning after a war veteran shot dead 13 relatives and neighbours, including his son, his Mother and a two-year-old in a tiny village near Belgrade.

Flags are flying at half-mast throughout the country and newspapers blacked out their front pages to commemorate Serbia's worst massacre in two decades.

The gunman was identified as 60-year-old Ljubisa Bogdanovic, who fought for Serbia in the 1990s war in Croatia.

He is now unconscious and in a critical condition, after shooting himself in the head.

The motive for the attack remains unclear.