SAN JUAN, Puerto Rico — At least 10 trailers full of food, water and baby supplies donated for victims of Hurricane Maria were left to rot at a state elections office in Puerto Rico, where they broke open and became infested by rats.

Radio Isla, a local radio station, posted a video Friday showing cases of beans, water, Tylenol and other goods covered in rat and lizard droppings.

The Puerto Rico elections commission offices had been used as a collection center for goods donated from around the country for victims of the devastating hurricane that struck the island last year. For weeks, hurricane survivors lacked running water and electricity. Widespread power failures and a severe diesel shortage kept stores, restaurants and banks closed, making it difficult for people to purchase groceries.

Records show that an additional 1,427 people died in the months after the storm, compared with previous years.

The goods donated by private entities and nonprofit groups were collected at the elections commission offices, and then distributed by the National Guard. Once the crisis subsided, goods were moved to trailers in the parking lot of the election bureau’s San Juan offices but apparently not delivered, despite continuing problems on the island. Authorities on Friday acknowledged that they have been there for nearly a year.

“I agree, it should have been handed out as soon as possible,” said Maj. Paul Dahlen, a spokesman for the National Guard.

He said some of the materials arrived after the National Guard ended its mission in May. He could not explain why no other agency distributed the materials after that.

But the head of the elections commission said that he has been calling the governor’s office and the National Guard regularly inquiring about plans to distribute the material, to no avail.

“Whatever was left after the National Guard left was put in those containers,” Nicolás Gautier, interim president of the elections council, told CBS News. “In one of these containers was food for dogs and apparently several of the boxes were broken. After the placement in the van, that brings a lot of rats and it infected everything.”

Gautier said the rats had moved from the trailers into the elections commission offices.

A spokeswoman for the elections commission said the offices were being used as a storage point at the request of Puerto Rico’s first lady, Beatriz Rosselló, who founded a group that served as an umbrella for donations, United for Puerto Rico. The spokeswoman said the donated material was being managed by the National Guard.

United for Puerto Rico said it had no knowledge of the containers and had nothing to do with them. In a statement, the National Guard said the container captured on video was being used to hold food that had arrived after its expiration date, and had not been held back from distribution to protect peoples’ health. However, the video also showed cases of water, which was also in short supply at times after the storm.

The Guard said the material in the trailers that isn’t spoiled, including batteries, electric fans and food, will be distributed to nonprofit groups in the coming days. It did not explain why the material had not been handed out earlier.

The New York Times viewed the containers Friday, two days after Radio Isla shot the video, but by then, they had been padlocked.

“The containers have been there for a long time, but they weren’t necessarily filled at all times,” Dahlen said. “The good thing is now that thanks to investigative journalism, it will help move along the process and get it where it needs to go in the coming days.”

It is unclear how many trailers had been at the site throughout the year. On Wednesday, the radio station saw nine trailers, plus a 10th that was being removed by the Department of Corrections.

It was not the first time food donated for Puerto Rico’s hurricane victims has gone to waste. Tons of supplies collected and sent by a South Florida man went bad when it turned out that he had paid the charter flight companies with fake checks. The airlines put a lien on the materials, which got soaked and ruined in the damaged airport.

On Thursday the man who organized the drive, Emilio I. Vazquez, 47, of Coral Gables, Florida, was ordered to pay $1.5 million restitution and sentenced to 120 months in prison.