The Kremlin on Tuesday rejected allegations that Russia was behind unidentified drones that flew over the capitals of Denmark and Norway the night before, disrupting air traffic and forcing dozens of flights to be diverted or canceled.

Danish Prime Minister Mette Frederiksen told local media she could “not rule out” Russian involvement in the drone activity near Copenhagen Airport. Ukrainian President Volodymyr Zelensky, writing on X after a meeting with the head of the IMF, directly blamed Russia but offered no evidence.

“Frankly, making unfounded accusations over and over again only leads to such statements no longer being taken seriously,” Kremlin spokesman Dmitry Peskov told reporters during a daily press briefing.

“Every time, we hear the same baseless claims. A side that claims to take a serious and responsible position should not be making such accusations time after time,” Peskov added.

NATO Secretary General Mark Rutte, who said he spoke with Frederiksen by phone, cautioned that it was “too early to say” whether Russia was responsible for the incident.