A 200-year-old tree crashed to the ground in Portugal on Tuesday, killing 13 people and injuring 49 others who had gathered near the towering oak for a religious celebration.

At least six of the wounded were seriously hurt when the tree fell near the city of Funchal, according to government officials. There were at least four foreigners of various European nationalities among the injured, the officials said; at least one of the deceased victims was a child.

Local authorities said it was not clear what had caused the tree to collapse.

“The tree was never earmarked as being in danger of falling,” Mayor Paulo Cafôfo of Funchal told reporters at a news conference.