In January 1962, Gbedemah and Kojo Bostio were summoned before the Central Committee to answer charges of attempting to overthrow the government through an illegal strike. In Nkrumah’s absence, the Central Committee revoked Botsio’s membership of the Party, of the Committee and of Parliament, his plea for clemency notwithstanding. Gbedemah did not appear to answer the charges against him and was expelled from the Party.
The next effort to overthrow the government was the attempt to assassinate Nkrumah at Kulungugu, a village on the border of Ghana and Upper Volta (now Burkina Faso) near Bawku in August 1962. On Nkrumah’s return from a meeting with Maurice Yameogo of Upper Volta concerning the unity of African groupings, a bomb which had been planted along the route exploded. Nkrumah was fortunate to escape injury, but a schoolboy was killed and fifty-six people were injured. Some elements of the press attempted to link the incident to the UK, which aroused the concern of the British High Commission and was deprecated by the Ghana government. This explosion heralded a series of other bombings, killing and causing injury to many. One soldier, W. O. Edward Tettey, an explosives expert, was placed under close arrest on 10 September 1962 for giving a misleading report on the Kulungugu explosion. While under questioning after a subsequent explosion, he apparently jumped from the fourth floor of the Police Headquarters building and later died at the Military Hospital.