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.
Emergency GCC-EU meeting to discuss Iranian aggression
Omani navy rescues cargo ship crew after missile strike
UN 'deeply disturbed' by strike on Iran school that killed 160 children
Saudi confirms attempted attack on oil refinery, no damage
At least four killed in Israeli strike on building in Lebanon's Baalbek
