The U.S. President Joe Biden and Ukrainian President Volodymyr Zelensky are planning to meet at the White House on Wednesday, according to two sources familiar with the planning underway, in what would be a surprise visit that could change based on security concerns, News.az reports citing CNN.

The visit, which hasn’t been finalized and has remained tightly held due to security concerns, will coincide with the administration’s intent to send the country a new defense assistance package that will include Patriot missile systems. It would mark Zelensky’s first trip outside Ukraine since the Russian invasion began in February of this year. His potential visit to Washington could also include an address to Congress.