Ukraine rejects Russian demand for surrender in Mariupol

Ukrainian officials defiantly rejected a Russian demand that their forces in Mariupol lay down arms and raise white flags Monday in exchange for safe passage out of the besieged strategic port city.

Even as Russia intensified its attempt to pummel Mariupol into surrender, its offensive in other parts of Ukraine has floundered. Western governments and analysts say the broader conflict is grinding into a war of attrition, with Russia continuing to bombard cities.

In the capital, Kyiv, a shopping center in the densely populated Podil district near the city center was a smoldering, flattened ruin after being hit late Sunday by shelling that killed eight people, according to emergency officials. The force of the explosion shattered every window in a neighboring high-rise. Artillery boomed in the distance as firefighters picked their way through the destruction.

Ukrainian authorities also said Russia shelled a chemical plant in northeastern Ukraine, sending toxic ammonia leaking into the air, and hit a military training base in the west with cruise missiles.