Sirens wail across Ukraine on the morning of Christmas Day. In many places, warnings are given of air raids. One possible connection: There are consistent reports that Russian fighter jets have taken off from Belarus.

Air alerts went off across Ukraine on Sunday morning. Several officials said the cities’ air sirens were blaring. The possible reason: Russian fighter jets of the type MiG-31K and IL-76 A50 took off in Belarus.

Several observers shared this development on Twitter, including a journalist from “Deutsche Welle”.

The Reuters news agency said it had not yet been able to independently confirm the information.