In 1997, the Japanese ambassador’s mansion in Lima was taken over by a terrorist group (Tupac Amaru rebels), where 72 hostages were held. A chess set was delivered during the hostage crises. Embedded in the chess pieces were tiny microphones. This gave the Peruvian Commandos intimate knowledge of the hostage-takers’ daily routine. The information allowed an assault by the commandos to free 71 hostages. One hostage, supreme court judge Carlos Acuna, died from a heart attack. All 14 terrorists were killed.