Powerful explosions rocked the Ukrainian city of Mykolaiv early Saturday, the mayor said, a day after authorities announced that at least 21 people had been killed when Russian missiles hit a building near the port of Odessa on the black Sea. Explosions leveled part of a building as residents slept on Friday, the latest in a series of what Ukraine says are Russian missile attacks targeting civilians.

In his Friday night video address, Ukrainian President Volodymyr Zelensky denounced the strikes as “conscious and deliberately targeted Russian terror and not some kind of mistake or chance missile strike.” Kyiv says Moscow has stepped up its long-range missile attacks, hitting civilian targets far from the front line. Russia says it was targeting military sites. Kremlin spokesman Dmitry Peskov cited President Vladimir Putin’s statements “that the Russian armed forces do not work with civilian targets”.

In another development, Prime Minister Narendra Modi, during an interview with Russian President Vladimir Putin on Friday on the current situation in Ukraine, reiterated India’s long-standing position in favor of dialogue and diplomacy. Speaking over the phone, the two leaders also discussed the state of global energy and food markets, Prime Minister Modi’s office said in a statement.