Two people have been killed in a Russian missile attack on Ukraine's central Poltava region, the local governor says. "As a result of the hostile attack, two people were killed, two people were taken to hospital with minor injuries, and the whereabouts of two more people are currently unknown," Governor Dmytro Lunin said on the Telegram messaging app on Monday. Lunin said the overnight attack was on an industrial facility. He did not provide further details. The Ukrainian military has said Russia launched four missiles from the Black Sea overnight, two of which were shot down. The military reported that Kryvyi Rih region was also hit by missiles in a separate attack. Local authorities said several private houses were damaged, but they did not report casualties. Ukraine's deputy defence minister said troops had liberated the southeast settlement of Robotyne and were trying to advance further south in their counteroffensive against Russian forces. "Robotyne has been liberated," Deputy Defence Minister Hanna Maliar was quoted as saying by Ukraine's military on Monday. The military said last week its forces had raised the national flag in Robotyne, but also said at the time they were still coming under fire in the settlement. Meanwhile Russia said it shot down a Ukrainian drone flying towards Moscow in the early hours of Monday in an incident that once again briefly disrupted flights over the capital. Authorities have reported more than a dozen attempted drone attacks on Moscow within the past month, a number of which have forced temporary airport closures. The drones appear to be probing Moscow's air defences from different angles, with Monday's brought down in the Lyubertsy region to the southeast of the capital, according to the defence ministry. State aviation agency Rosaviatsia said three airports temporarily restricted flights but later returned to normal operation. Moscow reported the first drone attacks on the capital in early May, when two were fired at the Kremlin without causing damage. Since then they have become a frequent occurrence. Most have been intercepted by Russian air defences, but several have hit buildings in a business district of the capital. Ukraine hardly ever takes responsibility for strikes on Russian territory, though officials have often expressed satisfaction over them. Australian Associated Press