Israeli authorities have arrested a Jewish-American extremist suspected of carrying out a series of high-profile hate crimes against Arabs, peace activists and a breakaway Jewish sect.

Israel's Shin Bet security service says Jack Teitel, a 37-year-old ultra-Orthodox West Bank settler, is behind the attacks, spanning 12 years.

Police and security forces said Sunday that Teitel's targets included the murder of two Arabs and bombing attacks against a prominent left-wing academic, a family of messianic Jews, a monastery and Israeli police, whom he accused of begin pro-gay.

Authorities originally suspected a Jewish underground for some of the attacks. But acquaintances described the father of four as a lone wolf, and authorities say he acted alone.