Citing MENA news agency, Xinhua reported that the blast targeted an electricity company's vehicle which was on its way to do power maintenance.
"Three were killed on the scene, one with abdominal bleeding died upon arrival at Arish public hospital, and the two wounded had leg amputation," a security source said.
On Saturday, also in Arish city, five police conscripts were shot dead by unidentified gunmen.
The ministry's statement said the five recruits were on their way back from vacation to their police central security department when the assailants stopped their vehicle and gunned them down.
