Martin Luther King Jr. was assassinated, creating nationwide riots, the widest wave of social unrest since the American Civil War. In Cleveland, Ohio, the "Republic of New Libya" engaged the police in the Glenville shootout, which was followed by rioting. The year also marked the start of the White Panther Party, a group of whites dedicated to the cause of the Black Panthers. Founders Pun Plamondon and John Sinclair were arrested, but eventually freed, in connection to the bombing of a Central Intelligence Agency office in Ann Arbor, Michigan that September. By 1969, the Black Panthers began purging members due to fear of law enforcement infiltration, engaged in multiple gunfights with police and one with a black nationalist organization. The Panthers continued their "Free Huey" campaign internationally. In the spirit of rising militancy, the League of Revolutionary Black Workers was formed in Detroit, which supported labor rights and black liberation. Peak in the early 1970s In 1970 the Honorary Prime Minister of the Black Panther Party, Stokely Carmichael, traveled to various countries to discuss methods to resist "American imperialism". In Trinidad, the black power movement had escalated into the Black Power Revolution in which many Afro-Trinidadians forced the government of Trinidad to give into reforms. Later many Panthers visited Algeria to discuss Pan-Africanism and anti-imperialism. In the same year former Black Panthers formed the Black Liberation Army to continue a violent revolution rather than the party's new reform movements. On October 22, 1970, the Black Liberation Army is believed to have planted a bomb in St. Brendan's Church in San Francisco while it was full of mourners attending the funeral of San Francisco police officer Harold Hamilton, who had been killed in the line of duty while responding to a bank robbery. The bomb was detonated, but no one in the church suffered serious injuries. In 1971, several Panther officials fled the U.S. due to police concerns. This was the only active year of the Black Revolutionary Assault Team, a group that bombed the New York South African consular office in protest of apartheid. On September 20 it placed bombs at the UN Missions of Republic of the Congo (Kinshasa) and the Republic of Malawi. In February 1971, ideological splits within the Black Panther Party between leaders Newton and Eldridge Cleaver led to two factions within the party; the conflict turned violent and four people were killed in a series