Border Police thwarted early on Thursday afternoon a stabbing attack near the Cave of Machpela in Hevron, the security force's spokesperson said.
One officer noticed a Palestinian youth approaching the Border Police and called out for him to halt.
Upon searching the would-be terrorist, a knife was found concealed in the sleeve of his shirt.
The suspect, a 16-year-old resident of Hevron, was arrested and taken for questioning at the Judea-Samaria District police precinct.
No Israelis were wounded in the incident.
Earlier on Thursday, IDF troops prevented a stabbing attack at an army base in Gush Etzion, when they apprehended three Arab women armed with knives.
The trio were taken into custody and are being questioned.