Egyptian border guards arrested seven African migrants trying to illegally enter Israel Saturday, in the latest of a line of incidents which has seen the United Nations criticise Cairo for an alleged "shoot to kill" policy. Navi Pillay, the United Nation's top human rights official, this month sharply criticised Egypt for using lethal force to stop migrants from crossing illegally into Israel. Pillay said she knew of "no other country where so many unarmed migrants and asylum seekers appear to have been deliberately killed." The Egyptian Foreign Ministry denied it was using such a trend wiith migrants saying in a statement that the numbers of the aressted migrants are dozen folds those of the shot. Warning shots were fired at the first group of four - who said they were Ethiopians who had paid 1000 dollars to cross the border. The second group consisted of three Eritreans. Late last month, border guards said they had fatally shot two African migrants trying to cross the border after the two ignored warning shots and orders to halt. Such killings suggested a "shoot-to-kill policy," Pillay said.