Russian forces are bombarding cities across the country, killing civilians who are unable to escape.
Russian forces hit a military training center in the west of Ukraine near the Poland border, according to reports.
Russian forces have made some gains in their attempt to seize the port city of Mariupol in the south of the country. There are people trapped in the city with limited food, water and electricity.
More than 1,500 people have died in attacks on Mariupol, according to the mayor's office. Russia was accused of preventing civilians from being evacuated.
The military training center in western Ukraine is close to the border with Poland.
The International Peacekeeping and Security Centre (IPSC) in Yavoriv district was the site of eight missiles being fired.
Thousands of people have fled to or passed through the city of Lviv in the west of Ukraine in order to get to Poland.
The IPSC is a training center for the Ukrainian army. The administration said that information about casualties is being established.
Russia's invasion of Ukraine began in the north, east and south of the country, but in recent days Moscow has expanded its attacks to sites in the center and west.
Holly Ellyatt.
According to an interview with a German newspaper, NATO Secretary General Jens Stoltenberg warned that Russia might use chemical weapons against Ukrainians.
It would be a war crime for Russia to use chemical weapons, but they appeared to be inventing an excuse for doing so, according to Stoltenberg.
In recent days, we have heard absurd claims about chemical and biological weapons laboratories.
Ted Kemp.
Russia is trying to break up the country by creating new "pseudo-republics", according to the president of Ukraine.
Zelenskyy said that the occupiers on the territory of the Kherson region are trying to create pseudo-republics.
Ukrainian soldiers march in formation toward a battle with Russian forces.
The Los Angeles Times has Marcus Yam.
Zelenskyy said that the plans for a new republic were rejected by the city council. Russian forces now control Kherson, which is in the south of the country.
The Ukrainian regions of Luhansk and Donetsk were recognized as independent countries by Russia.
Russia has supported the rebels in eastern Ukraine.
Ted Kemp.