Jerusalem (CNN) -- Israeli police were questioning a relative of the late Jewish extremist Rabbi Meir Kahane in its probe of a Palestinian mosque firebombing in the West Bank earlier this month.
Israeli police spokesman Micky Rosenfeld said the relative is from the Israeli settlement of Tapuah near the West Bank city of Nablus, but wouldn't release the person's name.
Rosenfeld said police will decide whether or not to make an arrest after the person is questioned.
No one was injured in the December 11 burning of the mosque. A Palestinian official said it reflected Israeli settler rage over a government moratorium on settlement construction.
An Israeli-American rabbi who founded the Jewish Defense League, Kahane also started a political party called Kach, which advocated the imposition of Jewish law in Israel and the expulsion of Palestinian Arabs.
The Israeli government banned Kach in 1988 for incitement to racism.
Kahane was murdered in 1990 in New York by El Sayyid Nosair, an Eygptian-American terrorist convicted of involvement in the bombing of the World Trade Center in 1993.