At least seven explosions and low-flying aircraft were heard around 2 am local time Saturday, Janurary 3, in the capital, Caracas. Venezuela’s government accused the United States of attacking civilian and military installations in multiple states.

Smoke could be seen rising from the hangar of a military base in Caracas. Another military installation in the capital was without power. People in various neighborhoods rushed to the streets. Some could be seen in the distance from various areas of Caracas.

Venezuela’s government, in a statement, said that President Nicolas Maduro had “ordered all national defense plans to be implemented” and declared “a state of external disturbance.” That state of emergency gives him the power to suspend people’s rights and expand the role of the armed forces. The government called on its supporters to take to the streets. “People to the streets!” the statement said. “The Bolivarian Government calls on all social and political forces in the country to activate mobilization plans and repudiate this imperialist attack.”

The Pentagon referred requests for comment to the White House, which didn’t immediately return an email seeking comment, the Associated Press said.

Meanwhile, the Federal Aviation Administration has banned US commercial flights in Venezuelan airspace over “ongoing military activity” ahead of explosions in Caracas. The FAA’s warning, known as “Notice to Airmen,” came shortly after one in the morning on the east coast of the US. It warned all commercial and private US pilots that the airspace over Venezuela and the small island nation of Curaçao, just off the coast of the country to the north, was off-limits “due to safety-of-flight risks associated with ongoing military activity.” The warnings are designed to alert pilots to a variety of dangers.

The explosions come as the US military has been targeting alleged drug-smuggling boats. On Friday, Venezuela said it was open to negotiating an agreement with the US to combat drug trafficking. Maduro also said in a pretaped interview aired Thursday that the US wants to force a government change in Venezuela and gain access to its vast oil reserves through the monthslong pressure campaign that began with a massive military deployment to the Caribbean Sea in August.

Maduro has been charged with narco-terrorism in the US. The CIA was behind a drone strike last week at a docking area believed to have been used by Venezuelan drug cartels in what was the first known direct operation on Venezuelan soil since the US began strikes on boats in September.

US President Donald Trump for months had threatened that he could soon order strikes on targets on Venezuelan land. The US has also seized sanctioned oil tankers off the coast of Venezuela, and Trump ordered a blockade of others in a move that seemed designed to put a tighter chokehold on the South American country’s economy.

The US military has been attacking boats in the Caribbean Sea and the eastern Pacific Ocean since early September. As of Friday, the number of known boat strikes is 35 and the number of people killed is at least 115, according to numbers announced by the Trump administration.