Denver police announced Saturday night that they had located the family of a young girl found in a stroller in the middle of Civic Center park after the pre-Independence Day fireworks show Friday night.

People watch fireworks over the Denver City and County Building Friday, July 3, 2015 at Civic Center Park in Denver.

The girl was found after the ending of the fireworks show. A call was made to police at 10:05 p.m.

The child’s mother, who was not named, was at the show and left the child with the grandmother, Denver police spokesman Sonny Jackson said.

“We’re not sure why the grandmother left the child alone and didn’t report it,” Jackson said Saturday night. “We’re investigating that now.”

The grandmother also was not named.

The child was found unaccompanied by any adults, Jackson said, adding that the child will remain in protective services until the investigation complete. “The biggest thing is the child is safe,” he said.

Earlier Saturday, Jackson said it’s not unusual for a child to become separated from a parent or babysitter. But this case was unusual because no one had contacted police looking for a missing child.

Police first sought help in locating the toddler’s parents through a tweet around 2 a.m. The girl has blond hair and green eyes and was described as being between 2 and 3 years old.

There was nothing on the stroller that could help immediately identify the child, he said.

“Several people have called in thinking that she was a relative or neighbor,” Jackson said. “It’s very unusual.”

Police searched for the girl’s family through the night and all day Saturday.