Brexit protesters in Northern Ireland set cars alight, attack police

Cars have been set alight, 20 police officers have been injured and masked people have pelted a police van with petrol bombs in further disorder in pro-British parts of Northern Ireland amid rising post-Brexit tensions in the region.

Many pro-British unionists fiercely oppose the new trade barriers introduced between Northern Ireland and the rest of the United Kingdom as part of Britain’s departure from the EU and have warned that their unease could lead to violence.

Political leaders, including Britain’s…