ANDREA ROSA and INNA VARENYTSIA 

BAKHMUT, Ukraine (AP) -- Block-by-block fighting is raging in two key eastern Ukrainian cities on the 100th day of Russia's war, grinding them to rubble.

The governor of the Luhansk region says that fierce battles continue in Sievierodonetsk and that the Russians continue to pummel neighboring Lysychansk.

Those are the only two cities in eastern Ukraine's Luhansk province not controlled by Russian forces or Moscow-backed separatists.

The Russians have been trying to encircle them.

In towns and cities near the fighting, artillery and missile strikes have downed power lines and punched through water pipes, leaving many without electricity or water as repair crews race to repair the damage.