NATO member Lithuania closed Vilnius Airport and Belarus border crossings on Sunday after several objects, identified as likely helium balloons, entered its airspace, the National Crisis Management Centre said, the fourth such incident this week.
Lithuania has said balloons are sent by smugglers transporting contraband cigarettes, but it also blames Belarus President Alexander Lukashenko, a close ally of Russian President Vladimir Putin, for not stopping the practice.
Traffic at the capital airport was suspended until 23:40 GMT, while the Belarus border will remain shut pending a meeting of Lithuania's National Security Commission on Monday, officials said.
The Vilnius airport also closed on Tuesday Friday, and Saturday of this week, as well as on October 5, each time due to balloons entering the capital's airspace, authorities have said.
South Korea and the United States will cut short annual joint military drills to five days from 11 and scale back some field training, the allies said on Wednesday, after President Donald Trump ordered a substantial reduction in US participation.
At least 100 people were killed when a low-tech artisanal gold mine collapsed in the Central African Republic on Tuesday, a senior official at a local mining association said.
An Israeli airstrike killed nine Palestinians at a police station in Gaza on Wednesday, medics said, two days after US envoy Jared Kushner ended a trip to the region that failed to push forward Donald Trump's plan to end the war in the enclave.
Thai schools conducted active shooter drills on Wednesday, as authorities moved to strengthen security measures two weeks after a 14-year-old opened fire at a school and killed at least eight people.