UIP

The provided articles do not mention any organization or entity called "UIP." Instead, they detail an incident in Madrid's Glorieta de San Bernardo where a 60-year-old man was arrested. He had allegedly set fire to a construction debris container. During the arrest, authorities discovered he was carrying a grenade believed to be from the Spanish Civil War era. As a result, the area was evacuated, and bomb disposal experts (TEDAX) were called in to handle the situation. The articles focus on the police response and the potential danger posed by the grenade, not on any specific organization named UIP. Therefore, it's impossible to provide information about UIP based on the given context.