Egyptian military Saturday arrested 12 people in connection with the attack on a police station in Al-Arish in Northern Sinai late Friday.
The attack left four people dead, including a police officer, while about 20 people were injured, including citizens who happened to be in the area at the time of the incident.
Several unknown armed men besieged the police station in North Sinai on Friday, in an apparent attempt to set it ablaze but the soldiers who stood guard prevented this, leading to an exchange of fire with the attackers.
The police station has been reinforced with additional security personnel, as investigations have commenced into the attack.
In a seperate incident, the military Saturday clashed with another group of armed men, who were trying to break into a gas station in Al-Arish, which exports gas to Israel through North Sinai.
Security sources told PANA the gunmen attacked the gas station with rocket-propelled grenades, adding that the attack did not record any human casualties.
The attackers destroyed the cooling line connected to the gas exporting line, which was empty at the time.
The pipeline, transporting gas to Israel has been attacked four times in the past few months.