Train drivers across Spain will strike for three days starting Monday. The strike protests poor safety on the country's rail system after two fatal crashes in January. One crash in Adamuz killed 46 people when a high-speed train derailed and hit another train. Two days later near Barcelona, a trainee driver died after a wall collapsed on a local train, injuring dozens. The train drivers' union Semaf demands hiring more staff and investing more in rail maintenance. It called the rail network's condition a “constant deterioration.” Safety checks found faults in several rail routes after the accidents. Spain's Prime Minister Pedro Sánchez will face questions in parliament this week about rail failures. A report found track fractures may have caused the Adamuz crash. Grooves on wheels of the derailed train and earlier trains suggest the track broke before the accident. The Barcelona crash happened when a wall fell on the train's driver's cab, causing derailment and injuries mostly in the first carriage. Semaf said these crashes are a “turning point” to ensure rail safety. The government says it has invested €700 million on the Madrid-Andalusia line, including where the Adamuz crash happened. Transport Minister Óscar Puente said, “We're not looking at a problem of lack of maintenance, we're not looking at a problem of obsolete [infrastructure], and we're not looking at a problem of lack of investment.” Despite this, the rail drivers continue their strike.