Russian attacks on nine regions of Ukraine have caused emergency power outages and damaged homes, wounding at least 15 people. Officials say the strikes come as there are fears of deteriorating relations between Kyiv and Washington that could leave Ukraine more vulnerable. Ukrainian President Volodymyr Zelenskyy has attended a Brussels summit with European leaders who have pledged support and urged the U.S. to pressure Russia. Tensions have risen after Zelenskyy and U.S. President Donald Trump exchanged critical remarks. Meanwhile, Ukrainian drones have forced flight cancellations in Russia. The United Nations reports a sharp increase in civilian casualties from Russian attacks.