Lithuania's Vilnius airport has reopened after reports of balloons in its airspace caused closures this weekend, amid a string of aviation disruptions across Europe.

Air traffic at Vilnius was restored at 4:50am on Sunday after a decision was made late on Saturday to close the airspace "due to a possible series of balloons heading toward Vilnius Airport," the airport's operator said in a statement on its Facebook page.

In total, around 30 flights and nearly 6,000 passengers were impacted, it added.

Overnight, most incoming flights were redirected to Denmark, Latvia and Poland, while departures were cancelled.

According to notices posted to the US Federal Aviation Administration's website, the flight restrictions were due to "hot air balloon flights".

It was not immediately clear who l

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