The United States military on Saturday shot down a suspected Chinese spy balloon off the Carolina coast after it traversed sensitive military sites across North America. China insisted the flyover was an accident involving a civilian aircraft and threatened repercussions.

President Joe Biden issued the order but had wanted the balloon downed even earlier, on Wednesday. He was advised that the best time for the operation would be when it was over water, US officials said. Military officials determined that bringing it down over land from an altitude of 60,000 feet would pose an undue risk to people on the ground.

China responded that it reserved the right to “take further actions” and criticized the US for “an obvious overreaction and a serious violation of international practice.”

In its statement Sunday, China’s Ministry of Foreign Affairs said that “China will resolutely uphold the relevant company’s legitimate rights and interests, and at the same time reserving the right to take further actions in response.” China’s Ministry of Defense echoed the statement later in the day, saying it “reserves the right to take necessary measures to deal with similar situations.”

The presence of the balloon in the skies above the US this week dealt a severe blow to already strained US-Chinese relations that have been in a downward spiral for years. It prompted Secretary of State Anthony Blinken to abruptly cancel a high-stakes Beijing trip aimed at easing tensions.

“They successfully took it down and I want to compliment our aviators who did it,” Biden said after getting off Air Force One en route to Camp David.

The giant white orb was spotted Saturday morning over the Carolinas as it approached the Atlantic coast. About 2:39 p.m. EST, an F-22 fighter jet fired a missile at the balloon, puncturing it while it was about 6 nautical miles off the coast near Myrtle Beach, South Carolina, senior defense officials said.

The spectacle had Americans looking to the skies all week, wondering whether the mysterious balloon had floated over them.

On Saturday, Ashlyn Preaux, 33, went out to get her mail in Forestbrook, South Carolina, and noticed her neighbors looking up — and there it was, the balloon in the cloudless blue sky. Then she saw fighter jets circling and the balloon get hit.