An Egyptian official says a roadside bomb has exploded in a Nile Delta city, killing two Military Academy students and wounding five other people.

Kafr el-Sheikh provincial governor Osama Wahid says the two were killed as they were driving near a sports stadium, and that an investigation is underway.

Attacks mainly targeting Egyptian security forces have spiked since the 2013 military overthrow of Islamist President Mohammed Morsi following massive protests against his divisive rule. Militant groups say they are avenging a security crackdown on Islamists, while authorities blame Morsi supporters for the violence.