British Prime Minister Theresa May is visiting Belfast on a trip designed to allay Northern Irish concerns about Britain's vote to leave the European Union.

May is meeting First Minister Arlene Foster and Deputy First Minister Martin McGuinness on Monday.

Northern Ireland is the only part of the United Kingdom to share a land border with another European Union member, the Republic of Ireland. Residents and businesses on both sides of the frontier fear a return to customs and immigration controls along the unmarked border.

May said Monday that "I have been clear that we will make a success of the U.K.'s departure from the European Union. That means it must work for Northern Ireland, too, including in relation to the border with the Republic."