Kou Voravong
The attack occurred at approximately 22:15, at Phoui Sananikone's, an official residence nearby the Voravong family's. The attackers launched three grenades by one of the windows on the ground floor, in the dining room. They fired three or four pistol shots and then run away. Kou voravong, sitting with his back to the window, was directly hit by a bullet which came in by the kidney and out through the navel, after cutting the vena cava and crossed the liver and intestines. His dead is declared shortly after admission to hospital. A dozen people were injured by the explosion of the grenades, slightly for most of them.
Democratic Party (Laos)
The party was established in 1948 by Kou Voragong, and was controlled by the Voravong family, who also paid for the party's newspaper "Sieng Lao" ("Voice of Laos") to be published. It won four of the 39 seats in the 1951 elections. Following Kou Voravong's assassination in 1954, it was reduced to three seats in the 1955 elections. However, the cabinet was constitutionally required to obtain the support of two-thirds of MPs, and therefore the party held a significant amount of power over the National Progressive Party, which had won 22 seats. It failed to win a seat in the 1958 supplementary elections.