BRUSSELS - European Commission President Ursula von der Leyen said on Monday that she had proposed a temporary restriction on non-essential travel to the European Union (EU), as escalations have been seen in both COVID-19 cases and containment measures.

"The restriction should be in place for an initial period of 30 days, which can be prolonged as necessary," said von der Leyen.

The proposal is expected to be discussed by leaders of EU member states during a video conference on Tuesday.

Following the news from the EU, the French presidency announced on Monday that measures will be announced in the coming hours on the external borders of the EU.

The decision on the EU's external borders is pending, but more European countries have joined the list of countries closing their borders to all but essential travel.

Germany has partly closed its borders with France, Austria, and Switzerland on Monday morning.

And more and more countries moved to close their borders in the hope of cutting off the cross-border transmission of the virus.

Finland, Hungary, Portugal, Switzerland became the latest countries to reintroduce measures on internal borders.

Movement restrictions, schools closure, suspension of businesses are being taken across Europe.

These measures are extraordinary at a time when Europe has been described by the World Health Organization (WHO) as the epicenter of the COVID-19 pandemic last Friday.

Since then, escalations have been seen in both the coronavirus cases and social distancing measures across the continent.

"We are at war," said French President Emmanuel Macron. He repeated the phrase several times in his televised address to the nation on Monday evening.

The president urged all citizens to stay home and reduce movement for at least 15 days to help the country battle the virus.

France's neighbor Belgium, a country with a population of some 11 million, has seen its coronavirus infection cases topping 1,000, with five deaths but only one recovery.

"Our country is facing an unprecedented and crucial health crisis," said King Philippe of Belgium in a speech Monday evening.