Two trains have collided head-on on a level crossing north west of Copenhagen, leaving five people critically hurt and 13 others with less serious injuries, according to medical officials. The crash occurred early on Thursday on a line linking the towns of Hillerød and Kagerup in North Zealand, with 37 individuals aboard. Tim Ole Simonsen from the Greater Copenhagen fire department was unable to determine the cause of the collision but confirmed all injured parties were transported to the hospital by air or ambulance. Local mayor Trine Egetved expressed her shock, emphasizing that the area is frequented by many residents and students. Images revealed the two yellow and grey trains severely damaged after the impact, which took place at 06:29 local time. Emergency services arrived swiftly to respond to the incident. Denmark's Prime Minister, Mette Frederiksen, voiced her concern regarding the accident, while police and investigation teams have begun examining the circumstances leading to this unfortunate event. Possible factors under consideration include signaling failures and human error. The safety director at Lokaltog has termed the collision one of the worst imaginable within the railway sector, urging the need for thorough data collection and analysis to prevent future occurrences. Pedersen, a police inspector, asserted it was too early to draw any conclusions on the incident's cause, as the investigation continues.