Newly obtained documents reveal more information about an “unidentified object” shot down by the Minnesota National Guard last year.

On February 12, 2023, Governor Tim Walz confirmed that Airmen from the 148th Fighter Wing took off from Madison, Wisconsin and shot down a flying object over Lake Huron as part of a federal mission.

Pentagon officials said the object was first detected over Montana, but was initially thought to be an anomaly. Radar then detected the object again over Michigan’s Upper Peninsula before planes shot it down over Lake Huron.

According to CTV Newsthe object was described as “octagonal” with spikes hanging from it and was slowly descending into Canadian waters before being struck by a missile. Officials say it was a suspected balloon that did not pose a military threat but could have interfered with domestic air traffic.

The Royal Canadian Mounted Police (RCMP) conducted a brief search involving the US and Canadian Coast Guards, but this was called off on February 16, 2023 due to weather and poor chances of recovery.

However, according to partially redacted emails gathered by CTVNEWS.ca, RCMP collected debris along the shores of Lake Huron in early March 2023.

“Following reports of unidentified aerial objects sighted in the Great Lakes area and elsewhere in North America, the RCMP conducted multiple searches with support from the Canadian Armed Forces,” an RCMP spokesperson said in a statement to CTVNews.ca . “Debris were recovered from the shores of Lake Huron, but after careful review, it was determined not to be a national security issue.”

The new discovery was never made public.

“The module is from a company that sells weather monitoring equipment,” a senior member of the RCMP told a Canadian military brigadier general in an email dated March 13, 2023. “It will be analyzed to determine if there is anything unusual with it, but I suspect not given the size. Whether or not it is from the shooting is uncertain.”

It is still unclear if the debris has been positively connected to the Lake Huron object.

The US shot down several high-altitude objects early last year, including a Chinese surveillance balloon off the coast of South Carolina.