Joe Biden touched down in Serbia on Tuesday as part of a White House effort to help them to improve relations with Kosovo.

Upon his arrival, Biden was welcomed by a delegation headed by Serbian Prime Minister, Alexsandar Vucic.

US Vice President Joe Biden (L) and Serbian Prime Minister Aleksandar Vucic (R) review honour guards during a welcoming ceremony in Belgrade on August 16, 2016. US Vice President Joe Biden starts a visit to the Balkans in Belgrade on August 16, 2016, where he will meet Serbian President Tomislav Nikolic and Prime Minister Alexsandar Vucic. / AFP / OLIVER BUNIC (Photo credit should read OLIVER BUNIC/AFP/Getty Images)

Image Credit: Oliver Bunic/AFP/Getty Images

As he continued to make his way from the plane, however, one group of Serbians wasn’t rolling out the welcome mat.