Donald Trump's joint appearance with Polish President Andrzej Duda in the battleground state of Pennsylvania has been canceled, according to a source familiar with the Republican presidential candidate's plans.

Former President Donald Trump will not attend mass at a Polish Catholic shrine in Bucks County alongside the Polish President Andrzej Duda, his campaign said.

The reasons for the cancelation were not specified. It is unknown if Republican presidential nominee Donald Trump and Polish President Andrzej Duda planned to meet elsewhere on the campaign trail.