Although Nuria del Río was happy with her job in an insurance company, she had studied journalism and did not rule out the possibility of one day pursuing her true vocation. She was married with a five-year-old daughter and was planning to have more children. Nuria and a friend used to take the suburban train to work from Santa Eugenia station. On the train they would meet up with Nuria’s sister, Marta del Río, and her boyfriend, Francisco Quesada. On the morning of 11 March, all four were killed in the train that was blown up alongside Calle Téllez.
11 March 2004 fell on a Thursday. Early that morning, a number of terrorists with links to Al-Qaeda planted thirteen bombs on four suburban trains covering routes running through Madrid. Ten of the bombs exploded between 7.37 and 7.39 am, when the trains were at Atocha, El Pozo and Santa Eugenia stations and alongside Calle Téllez. 191 people were killed in the attack and around 1,500 were wounded. It was the deadliest terrorist attack in Spanish history. On 3 April 2004, agents from the Special Operations Group (GEO) were about to enter an apartment in Leganés where the perpetrators of the attacks were believed to be hiding when the terrorists detonated twenty kilograms of explosives in an act of collective suicide. The ensuing blast killed one of the officers, bringing the total number of people killed by the 11 March bombers to 192.