Thai government buildings flew flags at half mast on Friday to mourn the deaths of more than 30 people, including 23 children, after an ex-policeman burst into a daycare centre in a knife and gun rampage that left the nation shocked and seeking answers. Most of the children who died at the daycare centre in Uthai Sawan, on Thursday were stabbed, police said, marking one of the worst child death tolls in a massacre by a single killer in recent history.

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