JERUSALEM — Several Jewish teenagers have been arrested in connection with the fatal stoning of a Palestinian woman in the West Bank, Israel’s internal security agency said on Sunday.

The agency, the Shin Bet, said in a statement that the suspects, who were not identified because they are minors, were under investigation for “grave terrorism offenses, including murder.”

The Palestinian woman, Aisha Rabi, who was in her 40s, was struck in the head by a stone as she rode in a car with her husband and two daughters near the settlement of Rehelim, in the occupied West Bank, on the night of Oct. 12. Her husband, Yaqoub Rabi, who was driving, said at the time that he believed the culprits were Jewish settlers and that he had heard them speaking Hebrew.

The Shin Bet said Ms. Rabi was the mother of nine children.

The five suspects are students of Pri Haaretz, a yeshiva high school for Orthodox boys in Rehelim, according to the authorities. The morning after the Friday night attack, the Shin Bet said, activists set out by car from the settlement of Yitzhar for Rehelim, where they briefed the students on how to prepare for, and deal with, Shin Bet interrogations.