Cyanide found in teacups shared by six found dead in Bangkok hotel

Victims at Grand Hyatt Erawan drank poison-laced beverage in murder-suicide plot, Thai police believe

Police investigating the deaths of six people found in the room of a luxury hotel in central Bangkok say they believe a member of the group poisoned themselves and others using cyanide.

Initial tests had detected cyanide, a deadly chemical that interferes with the body's ability to use oxygen, in a tea flask, six cups and in the blood of one of the dead men, police said. Based on interviews with a relative, they believe the deaths could be related to a business dispute.