Mexico: Protesters Burn Party Office Teachers and students protesting the abduction and apparent murder of 43 college students in September set fire Tuesday to the headquarters of President Enrique Peña Nieto's party in Guerrero State. The protesters, who clashed with the police over several hours, at one point detained the state security chief but later released him. A number of demonstrations have erupted since Friday, when federal officials said they had found burned remains that may be those of the missing students. Witnesses have told the authorities that the students were abducted by the police and turned over to a drug gang that killed them. A version of this brief appears in print on November 12, 2014, on page A6 of the New York edition with the headline: Mexico: Protesters Burn Party Office.