Bombs were found across Egypt this week, resulting in one casualty and three people injured. 

Two bombs were safely defused at Cairo airport, another exploded at the capital's center with no injuries, and another went off in Alexandria.

A 27-year-old was killed when the bomb exploded in front of Alexandria's Mabaret Al-Asafra Hospital, the city's assistant interior minister reported Tuesday. 

Just hours prior, bombs were found near the arrivals gate at the airport. Security tightened at the international hub while authorities reviewed surveillance footage to see who planted the explosives. 

According to state news agency MENA, Cairo security chief Khaled Youssef reported the central Cairo explosion as a "sound bomb" resulting in no deaths or injuries. 

Numerous bombings and other violent attacks have occurred across the country since former President Mohamed Mursi of the Muslim Brotherhood was overthrown in July 2013.

Last week, an affiliate of the Islamic State (IS) claimed responsibility for a stores of attacks in the Sinai Peninsula that left over 30 security personnel dead. 

Most of the attacks on security forces have occurred in the Sinai, which borders Israel and the Gaza Strip, although homemade bombs have been increasingly discovered in public places in Cairo.

President Abdel Fattah al-Sisi has launched an offensive against militant Muslims, and makes no distinction between IS loyalists in the Sinai and Muslim Brotherhood members, who claim to promote peaceful activism.