(NewsNation Now) — Thousands of Ukrainians are fleeing their homes by crossing the borders into countries to the west in search of safety as Russia pounds their capital and other cities with airstrikes for a second day.

A nation of 44 million people, many Ukrainians started arriving in neighboring central European countries on Thursday and the region braced for many more, setting up reception points and sending troops toward the borders to provide assistance. 

It’s estimated more than 1 million Ukrainians have fled to Poland, 400,000 to Germany, and 400,000 to the Czech Republic, sources told NewsNation.

Central European countries have braced for the arrival of refugees, with Poland setting up reception points on its border and Hungary and Slovakia planning to send troops to manage the likely influx.

To facilitate border crossings, Poland lifted quarantine rules on Thursday for people arriving from outside the EU without a lab-certified negative COVID-19 test.

The countries on the European Union’s eastern flank were all once part of the Moscow-led Warsaw Pact and are now members of NATO. Among them, Poland, Hungary, Slovakia and Romania all share land borders with Ukraine.

Earlier on Thursday, Russia launched an all-out invasion of Ukraine by land, air and sea, the biggest attack by one state against another in Europe since World War II. It confirmed the West’s worst fears and prompted fears of a massive flood of refugees fleeing Ukraine, a nation of 44 million people.

Poland called for the “fiercest possible sanctions” against Russia and the Czech foreign minister called the invasion a “barbaric act of aggression.”

Hungary’s Prime Minister Viktor Orban, who has forged good ties with Russian President Vladimir Putin, also condemned Moscow’s actions. He said Hungary would prepare humanitarian aid for Ukraine and was ready to receive refugees.

Ukrainians started trickling into Poland, with dozens arriving at the normally quiet Medyka crossing on Thursday, some carrying luggage and accompanied by children. 

HOSPITALS ON STANDBY

Poland is preparing a medical train to transport Ukrainians wounded in Russia’s assault on its neighbor, the country’s health ministry said, adding that Polish hospitals were ready to receive thousands of patients.

“We will do everything to ensure that every person who enters the territory of Poland has access to healthcare, including hospitalization. Beds are being prepared in hospitals for the admission of the wounded,” the health ministry said.

Poland’s Health Minister Adam Niedzielski said Poland had prepared a list of 120 hospitals where people affected by the conflict in Ukraine could be treated.

Small groups of people also fled into Hungary on Thursday through the Beregsurany crossing, some coming from as far as Kyiv, a Reuters eyewitness said. Some arrived by car, but many pedestrians were also hauling their suitcases across.

Slovakia said it was ready to help refugees.

“We can predict with near certainty that Russian aggression will drive out many Ukrainian women and men from their country,” Prime Minister Eduard Heger said. “Please, let’s have compassion and understanding for them.”

Slovakia will send up to 1,500 troops to its border with Ukraine, where additional crossings will be set up, said Defence Minister Jaroslav Nad. Hungary has also said it will send troops to its border to help process refugees. 

A Polish government spokesman said Polish diplomatic missions in Ukraine would remain open “as long as possible,” but the foreign ministry urged all Polish citizens to leave Ukraine.

Hungary also said its embassy in Kyiv remained open. The Czech Republic closed its diplomatic mission, though its consulate in the west Ukrainian city of Lviv remained open.

Germany offered humanitarian help to countries bordering Ukraine. German media have cited estimates that between 200,000 and one million people may flee to the EU from Ukraine. 

FLIGHTS, TRAIN SERVICES SUSPENDED

The Slovak railway halted services to Ukraine, and budget airline Wizz temporarily suspended all flights in and out of Ukraine. Czech Airlines also suspended flights as Ukraine closed its airspace. 

Slovak news agency TASR reported there were waiting times of two to four hours for passenger cars at two main border crossings, while another crossing saw traffic flowing smoothly.

Around 260,000 Ukrainians live in the Czech Republic, and tens of thousands are working in Slovakia and Hungary, which has a large ethnic minority of around 140,000 living in Ukraine just beyond the border.

Romania is ready to grant humanitarian aid if needed, President Klaus Iohannis said on Thursday. He also called for the “consistent consolidation” of NATO’s eastern flank.

Bulgarian President Rumen Radev said his country was preparing to evacuate by land more than 4,000 ethnic Bulgarians from Ukraine and was ready to host other Ukrainian refugees.