NEW : An American teaching English was a bystander when he was stabbed , family says . Egyptian troops deploy nationwide to curb unrest , a military spokesman says . Several members of the Muslim Brotherhood have been killed nationwide recently . But the largest opposition umbrella group said Morsy did not address his shortcomings , and issued a statement calling for snap presidential polls , a new government and constitutional amendments . Comment:
NEW : An American teaching English was a bystander when he was stabbed , family says . Egyptian troops deploy nationwide to curb unrest , a military spokesman says . Several members of the Muslim Brotherhood have been killed nationwide recently . Comment: