 A new phase of war with underwater drones is starting between Russia and Ukraine. Russian specialists are designing an underwater strike zone with a 5kg payload. It will also monitor hydro-technical facilities, a defence industry source told TASS. Design is underway of an underwater strike drone with four engines. It will carry a 5kg payload and have a range of up to 1km. Trials have to begin in February, the source said. The new craft will be used in Ukraine specifically in the Nipah River. The military need hardware to destroy hostile targets. It is an underwater strike drone, the source said. The drone will be also used in mine clearance. It will monitor hydro-technical facilities at a depth of 30 meters. If there is a report about a mined bridge, Pylon, you do not have to call divers. The submersible drone will be engaged, the source said. Earlier Ukrainian engineers have begun testing a new underwater drone that's expected to be used in attacks on Russian targets, including elements of the Black Sea Fleet. The unmanned underwater vehicle, which is known as the Marichka, was developed by a group of volunteer engineers calling themselves AMO Ukraine. According to the group, the unmanned underwater vehicle is 6m long and has a range of more than 997km. While to the casual observer it looks like a conventional torpedo, AMO Ukraine said the drone is capable of performing attack, transport or reconnaissance missions.