At least 37 people have been injured, five seriously, in a second crash, after Sunday's two-train collision in Andalusia.

Commuter rail service in Spain's northeastern Catalonia region was suspended Wednesday after a Barcelona commuter train crashed the night before, killing one person and injuring 37 others, authorities said.

Commuter rail service in Spain’s northeastern Catalonia region has been suspended after a Barcelona commuter train crash killed one person and injured 37 others

Two fatal train crashes in two days have rocked Spain, which is in national mourning, and the tragedies have led to questions about safety on the country's railway system. The first tragedy involved a high-speed train in southern Spain that derailed on Sunday evening,

A passenger train crashed in northern Spain on Tuesday night, killing one person and injuring dozen more, as the death toll from a train crash in southern Spain days earlier climbed to 42.

A commuter train hit a collapsed retaining wall near Barcelona on Tuesday, killing one person and injuring at least 15 people, according to officials.

The crash in Catalonia in northeastern Spain came just two days after a separate deadly train collision killed at least 42 people in the country's south and injured dozens more.

At least 40 people were killed and 152 more were injured after a collision between two high-speed trains in southern Spain on Sunday, according to officials. ABC News' Tom Soufi Burridge reports.