MEXICO CITY -- Three Marxist bomb attacks yesterday and another last Sunday are raising fears of a resurgence of the urban guerrilla movements that plagued Mexico in the 1970s.
Three dynamite time bombs exploded shortly after 5 a.m. yesterday, slightly damaging the Mexican headquarters of IBM, a McDonald's and a Sanborns department store restaurant, said Hector Pina, a spokesman for the Mexico City attorney general's office.
A Citibank building was bombed Sunday night.
There were no injuries, and damage was limited to broken windows and damaged furniture, Mr. Pina said.
In all four cases, a Marxist revolutionary coalition -- a longtime advocate of "prolonged war" -- claimed responsibility.
The coalition is the United People's Clandestine Revolutionary Workers Party and the Party of the Poor, a group that was formed in 1980 but has roots in the armed struggles that swept Latin America in the 1960s.