JERUSALEM — Avraham Shalom, who helped track down Adolf Eichmann and led Israel’s internal security agency in a long spying career for his country before resigning under a cloud over the killing of two Palestinian hijackers, died Thursday in Tel Aviv. He was 86.

A spokesman for the security agency, the Shin Bet, confirmed the death, giving no cause.

Mr. Shalom was recruited by the Shin Bet in 1950 as a former member of the elite Jewish fighting force Palmach, which he had joined in 1946, two years before the state of Israel was founded.

In 1960, he was the deputy commander of a team of four agents from the Shin Bet and Mossad intelligence services who tracked Eichmann, the Nazi war criminal, to Argentina, where he was living under an assumed identity.

The team captured Eichmann and spirited him out of the country to Israel, where he was tried as an architect of the Holocaust and executed two years later.