Live from NPR News in Washington, I'm Corva Coleman.
Officials in Denmark could consult NATO for guidance.
This comes after a fresh round of drones swarmed a Danish airport last night.
Earlier this week, more drones swarmed another Danish airport as well as one in Oslo, Norway.
NPR's Rob Schmitz has more on last night's incident.
Incoming and departing flights from Alborg Airport in northern Denmark were halted after drones were spotted in its airspace.
Three other smaller airports in southern Denmark also reported drone activity but were not closed.
The incidents come after Copenhagen Airport was forced to close earlier this week due to a drone incursion.
Prime Minister Metta Fedriksen called that incident the most severe attack on Danish infrastructure so far.
She said Russian involvement could not be ruled out.
A Kremlin spokesman called the allegations unfounded.
Last week,
Estonia and Poland requested a consultation with NATO members after they accused Russia of violating their airspace in separate incidents.
Rob Schmitts, NPR News, Berlin.
A federal government shutdown is getting closer unless Republicans and Democrats agree on a federal spending bill.
Democratic House Leader Hakim Jeffries says Democrats won't sign on to a spending bill unless Republicans restore deep funding cuts to federal health care programs.
Democrats do not support the partisan Republican spending bill
because it continues to gut the health care of the American people.
But Senate Majority Leader John Thune says Republicans are seeking a stop-gap spending bill so both sides can agree on a longer spending measure.
He says Democrats want to extend the Affordable Care Act, or the ACA.