Egyptian police use water cannon , tear gas to kill two protesters . Some youth protesters surrender to show solidarity with colleagues . Interior Ministry says that people were ' ` ` in violation of the protest . '' Some female detainees abandoned on a highway , ' , activists say .
Egyptian police use water cannon , tear gas to disperse two demonstrations . Some youth activists surrender to show solidarity with colleagues . Interior Ministry says 28 people were detained `` in violation of the protest law '' Some female detainees abandoned on a highway , witnesses , activists say .