Egypt’s Interior Ministry declared a high alert early Wednesday after several explosions shut down operations in several Cairo metro stations.
At least four people were injured in three separate metro stations, the Al-Ahram Arabic news website reported.
The explosions took place in the northern district of the capital city during the morning rush hour.
In one instance, a person was reportedly carrying a homemade bomb to a station, according to an interior ministry official who spoke with a privately owned television channel quoted by Ha’aretz.
Much of the violence in Egypt – and terrorism in the Sinai Peninsula — over the past year has been caused by radical Islamist protesters angry over the ousting of Muslim Brotherhood-backed former President Mohammed Morsi.
The former president was forced out of office a year ago by newly-elected President Abdel Fattah el-Sisi, who at that time served as the army’s field marshal and the government’s defense minister.
El-Sisi acted to depose Morsi after a year of constant street violence and a groundswell of protests that resulted in a petition bearing more than one million signatures demanding Morsi’s resignation prior to his ouster.