The US Department of Defence announced that the army shot down a fourth object flying over the country.
The ministry said in a statement that the army shot down the unidentified flying object over Lake Huron, Michigan, by order of US President Joe Biden.
"Its path and altitude raised concerns, including that it could be a hazard to civil aviation," the statement said.
The United States shot down an object that flew over Alaska last Friday and another over Canada on Saturday.
