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After the Russian Armed Forces on Monday announced a cease-fire in several Ukrainian cities, civilians in Sumy were able to successfully evacuate through a Russian corridor.

Corridors set up to help evacuate Ukrainians in other cities like Mariupol and Irpin were less successful.

Ukrainian officials have accused Russian forces of violating a cease-fire agreement and continuing to shell Mariupol, a port city, as it evacuates civilians.

Civilians sit inside a bus with bottled water and belongings during evacuations, amid the Russian invasion of Ukraine, out of Sumy, March 8, 2022 in this still image obtained from handout video. Deputy Head for President's Office, Ukraine/Handout via REUTERS THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY. MANDATORY CREDIT. NO RESALES. NO ARCHIVES

Civilians sit inside a bus with bottled water and belongings during evacuations, amid the Russian invasion of Ukraine, out of Sumy on March 8, 2022. (Deputy Head for President's Office, Ukraine/Handout via REUTERS)

"There have continued to be reports of shelling by Russian forces on agreed-upon humanitarian corridors," Secretary of State Antony Blinken said during a Tuesday press briefing. "We continue to call on Russia to allow for humanitarian access on the ground – both for supplies for people who have been cut off from food, water, medicine, and for humanitarian organizations like the International Committee of the Red Cross that can negotiate true humanitarian corridors so that civilians can safely leave the country."

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Russian forces set up the corridors as their aircraft bombed several Ukrainian cities. 

Rescue crews dig through the rubble looking for survivors after strikes by Russian forces amid their invasion, in Sumy, Ukraine March 7, 2022 in this handout video still image obtained March 8, 2022. Ukraine Ministry of Internal Affairs/Handout via REUTERS ATTENTION EDITORS - THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY.

Rescue crews dig through the rubble looking for survivors after strikes by Russian forces amid their invasion, in Sumy, Ukraine March 7, 2022 in this handout video still image obtained March 8, 2022. (Ukraine Ministry of Internal Affairs/ Reuters)

At least nine people died, including two children, according to the Ukrainian Interior Ministry.

Videos Tuesday showed people boarding buses, and multiple buses marked with a Red Cross driving along a snowy road as Sumy was given a safe corridor for evacuation.

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Ukrainian Deputy Prime Minister Iryna Vereshchuk said both sides agreed to a cease-fire in Sumy from 9 a.m. to 9 p.m. for the evacuation of civilians. Those leaving include foreign students from India and China, she said.

Buses wait during evacuations amid the Russian invasion of Ukraine, out of Sumy, March 8, 2022 in this still image obtained from handout video. Deputy Head for President's Office, Ukraine/Handout via REUTERS THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY. MANDATORY CREDIT. NO RESALES. NO ARCHIVES

Buses wait during evacuations amid the Russian invasion of Ukraine, out of Sumy, March 8, 2022. (Deputy Head for President's Office, Ukraine/Handout via REUTERS)

"The Russian Armed Forces announce a cease-fire regime from 10:00 Moscow time and open humanitarian corridors from Kyiv, Mariupol, Kharkov and Sumy - the Russian humanitarian headquarters," a translated tweet from the Russian military reads. "The decision was made at [French President Emmanuel] Macron's request to Putin."

In the Ukrainian cities of Mariupol and Irpin, however, Russian corridors did not offer relief to civilians fleeing destruction, according to Ukrainian officials.

Ukraine's Ministry of Foreign Affairs (MFA) said in a Tuesday tweet that Russian forces were "shelling the humanitarian corridor from Zaporizhzhia to Mariupol."

"[Eight] trucks + 30 buses ready to deliver humanitarian aid to Mariupol and to evac civilians to Zaporizhzhia," the Foreign Ministry added in its tweet. "Pressure on Russia MUST step up to make it uphold its commitments."

In a Monday tweet, the MFA said eight civilians were killed while attempting to evacuate through a corridor.

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Officials in Moscow said most of the corridors for fleeing civilians will lead to Russia either directly or via Belarus. Russia’s ambassador to the U.N. suggested that humanitarian paths could give people a choice in where they want to go.

Mariupol, Ukraine

A second evacuation attempt in Mariupol, Ukraine has failed. (FOX NEWS )

Ukrainian President Volodymyr Zelenskyy called for the expansion of humanitarian corridors on Tuesday.

The United Nations is estimating Tuesday that more than 2 million people have fled Ukraine since Russia began invading the country on Feb. 24.

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Of the 2,011,312 people that have left since Feb. 24, around 1.2 million have ended up in Poland, while nearly 200,000 are taking refuge in Hungary — countries that both share borders with Ukraine.

Fox News' Emma Colton, Greg Norman and the Associated Press contributed to this report.