- Summary- Ex-policeman killed 34 at daycare centre using knife and gun- After attack, he killed wife and son, turned weapon on himself- Police depict attacker as stressed by marital, money worries- Thai flags fly at half-mast on buildings to mourn attackUTHAI SAWAN, Thailand, Oct 7 (Reuters) - Grief-stricken relatives sobbed and clutched toys at a children's daycare centre on Friday, a day after a former policeman killed 34 people, most of them young children, in a knife and gun rampage there that has horrified Thailand.Government buildings flew flags at half mast to mourn victims - 23 of them children - of the carnage in Uthai Sawan, a town 500 km (310 miles) northeast of Bangkok, the capital of the largely Buddhist country.Register now for FREE unlimited access to Reuters.comPolice identified the attacker as Panya Khamrap, 34, a former police sergeant who had been discharged over drug allegations and who was facing trial on a drugs charge.Late on Friday, King Maha Vajiralongkorn visited the hospital where the injured were taken, according to photographs posted by the government's public relations office.About 24 children were at the centre when the attack began, fewer than usual as heavy rain had kept many people away, said district official Jidapa Boonsom."