Police sources revealed Wednesday that the would-be suicide bomber was caught near the Egyptian border in possession of an explosives belt.
During his interrogation, the suspect confessed to working with the Popular Resistance Committees. The incident is still under investigation and was not released for publication until now.
The highest state of alert was announced throughout Israel Tuesday ahead of Rosh Hashana.
Military sources told Ynet that the security establishment had eight specific indications of potential terror attacks over the holiday, as well as dozens of general indications of possible shooting and rocket attacks, suicide bombings and kidnapping attempts.
Defense Minister Ehud Barak has decided to impose a full closure on the West Bank and the Gaza Strip. The closure will take effect early Wednesday morning, and will be in place until the end of Rosh Hashana, when it is to be reassessed.
During the closure, large police forces are expected to patrol crowded public places, such as markets, shopping malls and bus stations. Come Wednesday evening, security forces are to shift their focus to synagogues.
Efrat Weiss contributed to this article