Cairo: Two bombs Thursday targeted a passenger train and a security checkpoint near a university in the Egyptian capital, the latest in a series of attacks in the country blamed on Islamist insurgents.

Three police officers and two soldiers were wounded when unidentified people inside a speeding car threw a home-made bomb at their checkpoint in the vicinity of the Helwan University in southern Cairo, Egyptian television reported.

Meanwhile, a sound bomb went off inside a train at Cairo’s main station, causing no casualties, health authorities said.

The blast, obviously aimed at causing panic, occurred minutes after the passengers left the train coming from the coastal city of Alexandria, rail officials said.

Egypt has experienced a series of attacks mainly against security forces since the army deposed Islamist president Mohammad Mursi last year.

The government blamed the unrest on Mursi’s Muslim Brotherhood and listed it as a terrorist organization.