The Lithuanian government has declared a "nationwide emergency situation" in response to a series of incursions from neighbouring Belarus by weather balloons carrying smuggled cigarettes, BBC reported. 

Prime Minister Inga Ruginiene condemned the balloon incursions as a "hybrid attack" by Belarus that posed a real risk to national security and civil aviation.

This year alone, officials say about 600 balloons linked to smuggling and almost 200 drones have entered Lithuanian airspace, leading to the repeated closure of Vilnius airport, according to BBC.