The U.S. intends to allocate an additional $2 billion to strengthen the security of Ukraine and other countries in the region, Secretary of State Antony Blinken said during a surprise visit to Kyiv on Thursday, AP reports.

He said half of the huge package will be divided among 18 other European countries that the U.S. believes are most potentially at risk of future Russian aggression.

The new aid package brings the total amount of U.S. aid to Ukraine to $15.2 billion since Biden took office.

U.S. officials insist that the new commitments are meant to show that U.S. support for the country in the face of a Russian invasion is unwavering, despite calls to spend more on domestic problems than on financing war for a non-NATO country.

In meetings with senior Ukrainian officials, Blinken said the Biden administration has notified Congress of its intention to provide Ukraine and other regional security partners and North Atlantic Treaty Organization (NATO) members with $2 billion in long-term foreign military funding.

The package would require congressional approval.

While $1 billion in military aid will go to Ukraine, the rest will be divided among Albania, Bosnia, Bulgaria, Croatia, the Czech Republic, Estonia, Georgia, Greece, Kosovo, Latvia, Lithuania, Moldova, Montenegro, Northern Macedonia, Poland, Romania, Slovakia and Slovenia.