Spain's transport minister Oscar Puente attends a press conference in Madrid. (EPA Images pic)MDRID: Spain's transport minister handed in his resignation on Tuesday following a train crash that killed 69 people, one of the worst railway disasters in Europe this century and a blow for prime minister Pedro Sanchez ahead of a snap poll this month.

Oscar Puente, who had earlier pledged to work "tirelessly" to restore confidence in the world's second-largest high-speed rail network, also said he was withdrawing from the Nov 29 general election.

Last week's crash, along with another disaster earlier this year, have overshadowed campaigning for the ballot, in which Sanchez is trailing in opinion polls.