Tibor Budi had been living in Spain for just a year and a half, after emigrating from his native Romania with his wife. The couple wanted to save up and return as soon as possible to live in the flat they had just bought. In Spain, they lived in San Fernando de Henares. Tibor was working as a bricklayer and his wife as a domestic worker. On the morning of 11 March 2004, the couple had breakfast together and Tibor took the train to Leganés with a colleague, Alois Martinas. Both men were killed on the train that was blown up beside 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 blast killed one of the officers, bringing the total number of people killed by the 11 March killers to 192.