A woman pushing a pram is recovering from her injuries after being struck by a falling Christmas tree.
Her child was unhurt but she suffered head injuries and a broken collarbone in the incident in St. Neots, Cambridgeshire.
Paramedics said the tree was part of the town's Christmas decorations and had been fixed to the side of a building.
Police said the woman's injuries were not life-threatening.
Health and safety experts are investigating.
"A woman was wheeling a pushchair when the tree came down bringing pieces of masonary with it," said an ambulance services spokeswoman.
"The child was OK, but the woman suffered a broken clavicle and head injuries."
A police spokeswoman added: "It appears that part of the wall where Christmas decorations were attached has come down on to the woman.
"We attended but the inquiry is a health and safety matter."
A spokesman for the Health and Safety Executive said officials have begun an inquiry.