Kyiv residents braced Saturday for another night sheltering underground, as Russian troops closed in on Ukraine’s capital and skirmishes were reported on the outskirts. Ukraine’s leader, meanwhile, claimed the country’s forces had repulsed the Russian assault, and he vowed to keep up the struggle and appealed for more help from the outside world.

“The real fighting for Kyiv is ongoing,” President Volodymyr Zelenskyy said in a video message in which he accused Russia of hitting infrastructure and civilian targets.

“We will win,” he said.

Central Kyiv appeared quiet on Saturday, though sporadic gunfire could be heard. And fighting on the city’s outskirts suggested that small Russian units were trying to clear a path for the main forces. Britain’s defense ministry said the bulk of Russian forces were 19 miles (30 kilometers) from the middle of the city.

Kyiv Mayor Vitali Klitschko extended a curfew he imposed Thursday to run from 5 p.m. until 8 a.m. He said “all civilians on the street during the curfew will be considered members of the enemy’s sabotage and reconnaissance groups.”

Russia claims its assault on Ukraine is aimed only at military targets, but bridges, schools and residential neighborhoods have been hit since the invasion began Thursday with air and missile strikes and Russian troops entering Ukraine from the north, east and south.

Ukraine’s health minister reported Saturday that 198 people, including three children, have been killed and more than 1,000 others have been wounded during Europe’s largest land war since World War II. It was unclear whether the figure included both military and civilian casualties.

In Kyiv, a missile struck a high-rise apartment building in the southwestern outskirts near one of Kyiv’s two passenger airports, leaving a jagged hole of ravaged apartments over several floors. A rescue worker said six civilians were injured.

The conflict has driven thousands of Ukrainians from their homes in search of safety. U.N. officials said more than 120,000 Ukrainians have left the country for Poland, Moldova and other neighboring nations.

Russian President Vladimir Putin sent troops into Ukraine after he spent weeks denying that’s what he intended, all the while building up a force of almost 200,000 troops along the countries’ borders. He claims the West has failed to take seriously Russia’s security concerns about NATO, the Western military alliance that Ukraine aspires to join. But he has also expressed scorn about Ukraine’s right to exist as an independent state.

Putin has has not disclosed his ultimate plans for Ukraine or said how long the Russian military operation could last. Western officials believe Putin is determined to overthrow Ukraine’s government and replace it with a regime of his own, redrawing the map of Europe and reviving Moscow’s Cold War-era influence.

It was unclear in the fog of war how much territory Russian forces have seized. Western governments claimed stiff Ukrainian resistance had slowed the Russian advance, and Russia does not yet control Ukraine’s skies.

Ukraine’s Infrastructure Ministry said a Russian missile was shot down before dawn Saturday as it headed for the dam of the sprawling water reservoir that serves Kyiv, and Ukraine said a Russian military convoy was destroyed near the city early Saturday. Footage showed soldiers inspecting burned-out vehicles after Ukraine’s 101st brigade reported destroying a column of two light vehicles, two trucks and a tank. The claim could not be verified.

In addition to Kyiv, the Russian assault appeared to focus on Ukraine’s coastline, stretching from the Black Sea port of Odesa, in the west near the border with Romania, to the Azov Sea port of Mariupol in the east.