Russia and the US have expressed concerns after the Russian jets collided with a US Air Force MQ-9 Reaper drone over the Black Sea. The US State Department said the incident was “unsafe and unprofessional,” while Russia said its jets were responding to an unidentified aerial vehicle that had entered its airspace. The Reaper was destroyed in the collision, increasing tensions between both countries. The incident has fuelled concerns about increasing tensions between the West and Russia.