What are the 'kamikaze' drones Russia is reportedly using?

A new wave of deadly Russian air strikes on Ukraine has killed more than 25 people and wounded over 100, according to authorities in Kyiv, in the most extensive attacks since the early days of the war. The current strikes, which began on October 10, have targeted at least 10 regions across the country and have been carried out using Russian missiles as well as Iranian-made drones, Ukrainian authorities have said. Swarms of explosive-laden, unmanned aircraft called "kamikaze" drones targeted Kyiv on Monday, killing at least four people and targeting energy facilities. Among the victims was a young couple expecting a baby in three months, according to the mayor of Kyiv. The Ukrainian Air Force said it destroyed at least 37 drones in one day.