The RVG has not been involved in an attack since April of 2001 and is presumed inactive.  It seems likely that they formed for the purpose of committing that attack and that they ceased to exist afterwards.  It is very common for Greek terrorist organizations to attack once and then disappear.

Revolutionary Worker Clandestine Union of the People Party

Popular Revolutionary Army -- Umbrella Organization

The Revolutionary Worker Clandestine Union of the People Party (Partido Revolucionario Obrero Clandestino-Union del Pueblo -- PROCUP) was formed sometime between the late 1960s and early 1970s. First appearing as the Union of the People, the PROCUP follows a Marxist-Leninist ideology and whose self-stated goals include the liberation of Mexico from "bourgeoisie and North American imperialism." The group merged with the Party of the Poor (Partido de los Pobres  --  PDLP) in 1980. Founded by the late revolutionary socialist Lucio Cabanas, the FDLP added a new element of Maoist ideology into the group; the PROCUP-PDLP has been noted for its use of Maoist guerrilla tactics. <p><br />The PROCUP-PDLP was active primarily in the states of Oaxaca and Guerrero, engaging in bank robberies, kidnappings, assassinations, and small-scale bombings. Targets symbolizing U.S. imperialism and the bourgeoisie, such as  McDonalds, Citibank, and middle-class restaurants, were bombed in Mexico City in the 1980s and early 1990s.    <br />

In May 1994, the PROCUP-PDLP became an official constituent group of <a href="?id=4541">the Popular Revolutionary Army (Ej&#233;rcito Popular Revolucionario -- EPR)</a>, representing a unified political-military command of 14 guerilla and opposition groups. Mexican government officials have suggested that the PROCUP-PDLP acted as the armed wing of the EPR and represented the bulk of its strength. Although Mexico's insurgency has calmed down and the EPR splintered in 2000, there is no evidence at this time to suggest that the individual groups have officially disbanded.