Peru has recalled its ambassador to Ecuador because of its neighbor's construction of a wall along a busy part of their common border. <br/><br/>Peru's move, announced by its foreign ministry, came as Ecuador pushed on with building the new four-meter high<br/>barrier along of the western side of its southern city of Huaquillas. <br/> <br/>The wall would physically separate the city from Peru's town of Aguas Verdes, lying just across a river, despite Peru's repeated demands that the work immediately stop. <br/><br/>The row has revived tensions between the two South American countries. Peru's foreign ministry said in a statement that it viewed the border wall as a violation of a 1998 bilateral peace accord. <br/><br/>The issue of border walls has become especially sensitive in Latin America as US President Donald Trump has promised to build a barrier along the entire southern edge of his country, to prevent undocumented immigrants from crossing over from Mexico.