One Egyptian soldier was killed on Friday and at least seven more people wounded in two suicide attacks in South Sinai and another policeman died in a Cairo bomb attack, official sources said.
Militant attacks in Egypt have spiraled since the army deposed President Mohamed Morsi of the Muslim Brotherhood last July, with tensions ratcheting up further ahead of elections for a new leader at the end of the month.
The fatal South Sinai attack occurred in El-Tur, a town on the main road between Cairo and the tourist resort of Sharm El-Sheikh. Three other members of the police and one soldier were injured, according to an Interior Ministry statement posted on Facebook.
Four Egyptians were wounded in the second attack, further south on the road between El-Tur and Sharm El-Sheikh, the Interior Ministry and security sources said.
A spokesman for the governorate of South Sinai province speaking with a private television channel identified those wounded as employees of a tourism company. The Interior Ministry referred to them as factory workers and to the bomber in the second incident as a "suicide attacker".
A third bomb killed one policeman at a traffic security post near a court house in Cairo's Heliopolis district, security sources said. At least three others were wounded in the attack, according to state television.
While most of the recent militant attacks have targeted the security forces, three South Koreans were killed in February when a bomb targeted a tourist bus in South Sinai near a border crossing with Israel.
The army has been waging a campaign against armed Islamist groups in North Sinai. The influence of such groups expanded in North Sinai after the 2011 uprising that toppled Hosni Mubarak from the presidency.