AVT expressed doubts about the conclusion reached by the Spanish judiciary . Specifically , the AVT asked why no pictures of the alleged perpetrators were found , unlike in the 7 July 2005 London bombings , and why the type of explosives used remains unknown . The association also questioned the relationship between the alleged perpetrators and the National Police Corps of Spain and Guardia Civil
7 July 2005 London bombings
7 July 2005 London bombings
Asociación de Víctimas del Terrorismo