Modernization efforts moved forward in the 1960s under the direction of the lonchen, Jigme Palden Dorji, the Druk Gyalpo's brother-in-law. In 1962, however, Dorji incurred disfavor with the Royal Bhutan Army over the use of military vehicles and the forced retirement of some fifty officers. Religious elements also were antagonized by Dorji's efforts to reduce the power of the state-supported religious institutions. In April 1964, while the Druk Gyalpo was in Switzerland for medical care, Dorji was assassinated in Phuntsholing by an army corporal. The majority of those arrested and accused of the crime were military personnel and included the army chief of operations, Namgyal Bahadur, the Druk Gyalpo's uncle, who was executed for his part in the plot.