Four people sustained minor injuries at the Jelling Music Festival on Wednesday evening when a fence collapsed. The incident led to a temporary delay in the concert schedule.

The Vejle Amts Folkeblad reported that the concert was delayed for about 25 minutes following the collapse. Festival organizers attributed the incident to a “construction defect” in the fence.

In response to the incident, the festival has announced it will conduct a thorough review of all structures to ensure safety. The Jelling Music Festival is a four-day event anticipated to draw as many as 40,000 attendees.