Finnish media outlet Helsingin Sanomat has reported that a drone threat alert issued for the Helsinki area in mid-May may have been caused by a mistake on Ukraine's part.

A Ukrainian error reportedly triggered a drone alert in southern Finland in mid-May, says Helsingin Sanomat.

Finnish media outlet Helsingin Sanomat has reported that a drone threat alert issued for the Helsinki area in mid-May may have been caused by a mistake on Ukraine's part.