The Israel Security Agency (Shabak, or Shin Bet) issued a special report this month on the involvement of illegal migrant workers from 
"Very often, the drivers are aware or suspect that they are transporting terrorists," the ISA states.
the Palestinian Authority in terrorist activities. Israeli Arabs and residents of eastern Jerusalem operate regular "lanes" into Israeli cities, often knowing they are transporting terrorists, the report says.
With several case studies, the ISA report reveals how PA jihadist groups have taken advantage of illegal migrants as a "platform for terror" inside Israeli cities and towns. Such organizations often take advantage of the specialized knowledge illegal migrant workers, and their smugglers have collected regarding ways to infiltrate and escape from Israeli jurisdictions undetected. Undocumented workers have also served as active smugglers, successfully bringing weapons, equipment, explosives and terrorist agents through Israeli security perimeters.
In some cases, the illegal migrant workers were themselves the terrorists. Arabs working in Israeli towns and cities illegally have provided PA terror cells with intelligence on selected targets, advice on planning attacks, and have been involved in attacks themselves. The familiarity illegals develop with security procedures and general life patterns among Israelis aids in planning attacks, as does their ability to blend into Israeli society either while working or by imitating Jewish social codes and dress.
For the past several years, between 60 to 100 illegal PA migrants are arrested annually for involvement in terrorism, according to ISA statistics. In addition, the ISA report makes it clear that Israelis who transport and employ the illegal PA migrants regularly serve as potential accomplices to terrorism.
"In order to smuggle terrorists or weapons for an attack (explosives belts or other devices) in Israel, the illegal migrants are aided by drivers who transport along a 'lane' between Judea and Samaria and Israel," the ISA report says. "In practice, there is an organized and systematic network of transportation in operation for smuggling illegal migrants into Israeli territory."
This profitable transportation network, the report explains, includes Israeli Arabs and residents of eastern Jerusalem who hold Israeli ID cards. "Very often, the drivers are aware or suspect that they are transporting terrorists," the ISA states. The report calls the smuggling of illegal workers a "short distance" away from smuggling weapons and terrorists.
The ISA report also makes it clear that the intensified security along the Israeli border with the PA, along with the security barrier established along much of that seamline, has increased the importance of the illegal migrant infiltrators to PA terrorist groups. The smugglers and those intent on finding work in Israeli cities are regularly testing methods and probing for holes in this perimeter, with their experience and knowledge readily absorbed by the terrorist organizations.