Egypt has begun to install cameras and motion detectors along the border they share with Gaza in order to prevent the smuggling of weapons by Palestinian militants.
While the cameras will monitor the border above ground the motion sensors will be able to detect activity through tunnels that have been used to smuggle in food, medicine and weapons for Palestinians.
Israel had destroyed many of the tunnels during their three-week offensive in Gaza but many still exist and some are being rebuilt. The Israelis have warned that if Hamas continues to bring weapons into Gaza then airstrikes will resume.
Palestinians have relied on the tunnels for basic needs as Israel continues a tight blockade.