Croatian Prime Minister Andrej Plenkovic said after the inauguration of US President Joe Biden and Vice President Kamala Harris on Wednesday that he was looking forward to strengthening bilateral ties with the United States.

“Congratulations to the new President of the United States Joe Biden and Vice President Kamala Harris. Croatia and the United States are friends and partners. Looking forward to strengthening bilateral relations and our transatlantic alliance,” Plenkovic wrote on Twitter.

Biden, 78, was sworn in as the 46th US president on Wednesday, becoming the oldest US president in history.

Harris is the first black and first woman to serve as US vice president.