Three people were killed in a shoot-out at a Thai courtroom on Tuesday during a hearing into an inheritance dispute, according to police, who said two of the victims were lawyers.The gunman opened fire on the opposing side in the dispute in Chanthaburi provincial court, before a guard shot back and fatally wounded him.National police office spokesman Krissana Pattanacharoen said three people including the assailant were confirmed dead, while others were injured in the melee.“Two are lawyers…