COPENHAGEN, Denmark (AP) — NATO secretary-general Anders Fogh Rasmussen says the alliance has observed a Russian “incursion” into Ukraine, which Russia denies.

During a visit to Copenhagen on Friday, Fogh Rasmussen told reporters: “I can confirm that last night we saw an incursion (into) Ukraine.” Rasmussen did not give details of the alleged incursion but said “what we have seen last night is the continuation of what we have seen for some time.”