CHISINAU, Moldova — A flight scheduled to carry Ukrainian President Volodymyr Zelenskyy from Moldova to Norway was ​delayed when authorities closed Moldova’s airspace because of a drone incursion, a government spokesperson said Wednesday.

Moldovan police said a Russian drone crashed on Tuesday in a sunflower field on the outskirts of a village in Riscani district, which caused four fires to break out but no injuries.

On Wednesday, government spokesperson Dumitru Ciorici said Moldova had closed its airspace on Tuesday afternoon to protect aircraft flying over the country at the time, delaying three departures, including the one carrying Zelenskyy.

Moldovan authorities confirmed the drone came down and exploded 160 kilometers (100 miles) from Chișinău International Airport. The airspace restrictions were lifted and Zelenskyy’s plane took off later than scheduled.

The drone that entered Moldovan airspace on Tuesday crossed into neighboring Romania, a NATO member, where it was tracked through several northeastern counties.

The ministry said two F-18 aircraft of the Spanish Air and Space Forces were raised to track its trajectory before it reentered Moldovan airspace.

On Wednesday, Moldova’s police said explosives experts discovered fragments of the drone that featured a propulsion system and characteristics similar to a Geran-type drone, which Moscow has used extensively in its full-scale war in Ukraine.

“Investigations identified the point of impact, where an explosion occurred and a crater of considerable size was formed,” police said, adding that specialists are continuing investigations “to determine the type and mass of the explosive payload.”

Ukraine neighbors both Romania and Moldova, and since Russia’s full invasion in 2022, both countries have reported dozens of drone incidents.