The figure represents a new record by a wide margin. The previous record from April this year was 6,583.
In addition to the long-range drones, Russia fired over 200 missiles at Ukraine in May. In one of the largest Russian attacks, on the night of May 14, more than 20 people were killed in the capital, Kyiv.
AFP bases its analysis on daily reports from the Ukrainian Air Force, which also show that around 91 percent of all drones and missiles launched by Russia in May were shot down.
Russia's full-scale offensive war against Ukraine has been going on for over four years.
