Russian aerial drones struck the Ukrainian electricity grid in the Odessa and Mykolaiv regions in the south of the country in the early hours of Monday, the Ukrainian military reported. Power cuts occurred in parts of Odessa and its hinterland. The city authorities said they were forced to halt tram and trolleybus services. No injuries were reported. A substation in the Mykolaiv region caught fire after taking a hit, the state-owned Ukrenergo energy supply company reported. The military authorities reported that debris from a drone hit a two-storey residential building in the region, setting i…