At least two people have been wounded after a powerful bomb explosion rocked a police station in the Egyptian capital, Cairo, security sources say.

This comes after a home-made bomb went off in a police station in the capital Cairo on Saturday.

In another development, the army managed to defuse a bomb planted on a railroad linking two canal cities of Suez and Ismailia. Army officials say the explosive device targeted a train with at least 300 passengers.

Meanwhile, dozens of militants have been killed in army’s raids on their hideouts in North Sinai Peninsula. Reports say clashes are still underway in at least 12 villages in Sheikh Zuwaid area which borders both Israel and the Gaza Strip.

The developments come two days after Egypt’s interim Interior Minister Mohamed Ibrahim survived an attack, which was carried out near his home in Cairo’s Nasr City district on Thursday.

Also an Egyptian court has charged ousted president, Mohammed Morsi, with insulting the Judiciary. An investigative judge has ordered a four-day detention for Morsi. He is going to be questioned over allegations of accusing judges of rigging the 2005 parliamentary elections.

Morsi made the allegation days before his overthrow by the army on July 3.

Morsi, along with senior members of Muslim Brotherhood, is facing a series of other charges including allegedly inciting murder of protesters rallying against him in December.

Since his downfall, Morsi has been held in an undisclosed location. Many in Egypt believe that pressure on Morsi and the Muslim Brotherhood is part of a campaign to exact political vendetta against the movement.

About 1,000 people were killed in a week of violence between Morsi supporters and security forces after police dispersed their protest camps in a deadly operation on August 14.

The massacre sparked international condemnation and prompted world bodies to call for an independent investigation into the violence.