The U.S. State Department has revoked the visas of members of the British rap duo Bob Vylan after the band's lead singer led the crowd in chants of "Death to IDF" during their performance at the Glastonbury Festival. The duo was scheduled to begin a tour in October across about 20 U.S. cities, including New York, Washington, Los Angeles and Nashville. A senior State Department official said: "Foreigners who glorify violence and hatred are not welcome visitors in our country."