The European Commission has been working for several weeks to prepare to receive Ukrainian refugees, should the situation escalate further.

But Ylva Johansson, who is responsible for the EU's migration policy, does not want to say what the scenarios look like in detail.

- Putin is so unpredictable, so it's incredibly difficult to know.

I refrain from communicating numbers, she tells TT in an interview done on Wednesday afternoon.

- There will certainly be many people who come.

We are ready to deal with that issue.

Poland is preparing

This week, Ylva Johansson visited Poland to see on the spot how the country is preparing to receive people on the run.

Already today, over 1 million Ukrainians live in Poland.

- It is likely that many come to Poland, partly because it is a neighboring country, but also because many may consider applying to countries where you have friends and relatives, says Ylva Johansson.

- We have contact with the countries that have a large Ukrainian diaspora, so that they should also be prepared for the fact that many may come.

In addition to Poland and other neighboring countries, these are Italy, the Czech Republic and Portugal, where many Ukrainians live in relation to the country's size.

Not Sweden

In countries that otherwise received many refugees - such as France, Germany, Belgium and Sweden - the Ukrainians are fewer.

- It is not very likely that Sweden will be the country that will receive the most Ukrainians, says Johansson.

But it is most likely that many Ukrainians will become internally displaced in their own country, that they will have to move from one region to another.

- The big challenge will be to support Ukraine, says Johansson.

Ukraine has 44 million inhabitants and around 1.5 million are still estimated to be internally displaced after Russia's annexation of Crimea in 2014.

Few of the Ukrainians who came to the EU in 2014 sought asylum, according to Ylva Johansson, instead they stayed because they got a work permit.

Ukrainians do not need a visa and it is therefore quite easy for them to get to an EU country.

Is solidarity being tested again?

After the refugee crisis in 2015, solidarity between EU countries was tested when asylum seekers from the war in Syria were to be received.

Migration policy is an area where the dividing lines are greatest in the EU.

But Ylva Johansson is more hopeful about today's situation.

- I feel that there is an impressive consensus in the EU regarding the attitude towards Putin and the support for Ukraine, she says and believes that this will be reflected when it comes to receiving Ukrainians.

She emphasizes that this is a very frightening situation, and that the great danger is what is happening in Ukraine.

- The big challenge is not what happens in the EU if there are many Ukrainians fleeing here, the big concern is what happens in Ukraine.

What will Putin do?

That is the big concern, says Ylva Johansson.