A commuter train hit a collapsed retaining wall near Barcelona in Catalonia, injuring several people. The accident happened on Tuesday in Gelida municipality. The region’s civil protection agency said, "A retaining wall collapsed onto the tracks, causing an accident involving a passenger train." Emergency services are treating at least 15 injured passengers with 11 ambulances on site. Spanish broadcaster TVE reported that four people, including the train driver, are seriously injured. Spain’s railway operator ADIF blamed the collapse on heavy rainfall that swept across Catalonia this week. This incident comes just two days after a deadly collision of two high-speed trains in southern Spain's Andalucía, which killed at least 42 people.