Editor’s note: This article has been changed to reflect that the incident happened in a crosswalk in front of the school and not on school property.

A 7-year-old boy was bitten by a dog in a crosswalk outside New Vision Charter School in Loveland on Wednesday afternoon, according to the Loveland Police Department.

The police department and Larimer Humane Society’s Animal Protection and Control department were called to the school at 2366 E. First St. around 3:30 p.m., according to a report from the police department. A child had bent down to pet a dog and it bit him on the face.

The child was being treated by the school nurse when police arrived and was then taken by his mother for further medical treatment. The severity of his injuries is unknown.

The dog and the child were in a crosswalk in front of the school when the incident occurred, according to the police report. New Vision principal Mary Baker said that the dog was not on school grounds and that the incident happened after school hours. There is no video of the event.

The owner of the dog had been previously warned not to bring it onto school property, the police report said.

The school policy asks parents not to bring any pets to the school, Baker said.

The investigation into the incident is ongoing, said Kara Pappas, a spokesperson for the Larimer Humane Society. As of Friday, no charges have been filed against the dog’s owner.

“Larimer Humane Society’s Animal Protection and Control department responds to more than a thousand calls every year regarding animal bite cases, most of them involving a dog,” a newsletter from the Humane Society said. In five years animal bite calls increased by 57% in Larimer County and children were the victims in many cases, it stated.

The Humane Society has a list of tips at its website, larimerhumane.org, for bite prevention. These include not petting an unfamiliar dog without its owner’s permission, not petting dogs when they are sleeping, eating, tied up, chewing on a toy or looking after puppies, and being aware of signs of fear or aggression dogs may exhibit.

Tail tucking and flattened ears are signs of fear, and bared teeth, lunging and standing with the tail straight up are signs of aggression.