And three Puerto Rican pro-independence activists have been subpoenaed by the U.S. government to appear before a grand jury in New York. The activists have been identified as Tania Frontera, Christopher Torres and Julio Antonio Pabon. The FBI is also reportedly trying to locate Hector Rivera of the musical group the Welfare Poets. The newspaper El Diario reports the grand jury might be linked to an FBI investigation into the Puerto Rican independence group Los Macheteros. In 2005, FBI agents shot dead the group’s leader, Filiberto Ojeda Rios.