WASHINGTON – Secretary of State Antony Blinken postponed an imminent trip to China because a Chinese surveillance balloon drifting over the U.S. is a “clear violation” of sovereignty and international law,  Biden administration officials said Friday. 

Blinken will reschedule the trip when conditions are right, officials said.

Although the trip had not been officially announced, Blinken had been set to leave Friday night, a day after the Pentagon announced it had spotted what it identified as a spy balloon flying over the U.S.

China disputed that characterization, calling it  a “civilian airship” that blew off course.

Later Friday, the Pentagon acknowledged reports of a second balloon flying over Latin America. “We now assess it is another Chinese surveillance balloon,” Brig. Gen. Pat Ryder, Pentagon press secretary, said in a statement, declining to offer further information such as where it was spotted.

Some lawmakers criticized the Biden administration for how it has handled the situation, and for not taking stronger action against China. Sen. John Tester, a Montana Democrat and chairman of the Defense Appropriations Subcommittee, said his committee will hold a hearing on the matter. “China’s actions are a clear threat to those values and to America’s national security, and I’m demanding answers from the Biden Administration,” he said in a statement. “I will be pulling people before my committee to get real answers on how this happened, and how we can prevent it from ever happening again.”

The airship over the U.S. is used for meteorological and other research, the Chinese government said in a statement in which it expressed regret for the balloon’s “unintended entry” into U.S. airspace.

U.S. officials stand by their assessment. 

“We know that it’s a surveillance balloon,” Ryder later told reporters.

The balloon seen over U.S. air space is likely to remain over the United States for a few days, Ryder said.

Shooting down the airship poses too high a risk to people and property from debris, two U.S. officials said Friday. Other options are being explored, according to the officials who were not authorized to speak publicly.