The premises of a Catholic church in Newtown, Connecticut, were declared "all clear" Sunday after a threat of violence prompted authorities to evacuate the building, police said.

Investigators found nothing to substantiate the reported "violence threat" at the St. Rose of Lima Roman Catholic Church, Connecticut State Police Lt. J. Paul Vance said. He declined to provide additional details.

In front of the church, authorities were seen collecting stuffed animals from a makeshift memorial and placing them in plastic bags.

A column of armed police officers walked across the church property and entered a building next to the church's parking lot.

There were about 500 people inside the church when authorities evacuated it, said Brian Wallace, a spokesman for the Roman Catholic Diocese of Bridgeport. Officials have canceled Sunday night activities at the church, he said.

The church is less than two miles from Sandy Hook Elementary School, where a gunman killed 20 children and six adults Friday before killing himself.