Secretary of State Antony Blinken made an unannounced trip to Kyiv on Thursday, where he is expected to announce billions of dollars more financial aid to help Ukraine in Russia"s invasion, writes NPR.

This is Blinken’s second trip to the Ukrainian capital since this year’s conflict began in February. He is the highest-ranking official in the Biden administration to visit the country in over six months of conflict. After arriving in Kyiv early Thursday, Blinken visited a children’s hospital and met with U.S. Embassy staff.

Later in the day, he is expected to announce that the Biden administration plans to ask Congress to make another USD 2 billion available for long-term investments in security in Ukraine and neighboring countries, many of whom are in NATO and are at risk of future Russian aggression, State Department officials said.

He is also expected to give more details about an additional USD 675 million in military aid announced earlier Thursday by Defense Secretary Lloyd Austin, who is Germany at a meeting with defense counterparts from all over the world.