(Some images may contain graphic content)

Israeli emergency personnel carry the body of a victim from the scene of an attack at the Bnei Torah Kehilat Yaakov synagogue Nov. 18, 2014 in Jerusalem. Four rabbis, including three Israeli-American citizens, were killed and six injured in the deadliest attack in Jerusalem in years amid soaring tensions in the Holy Land.

Onlookers stand near the scene of an attack at the Bnei Torah Kehilat Yaakov synagogue Nov.18, 2014 in Jerusalem.

Israeli emergency personnel place a body of a victim into an ambulance outside the Bnei Torah Kehilat Yaakov synagogue, where worshippers were attacked early Nov. 18, 2014, in the Har Nof neighborhood of Jerusalem.

Ultra-orthodox Jews look out a window near the scene of an attack at the Bnei Torah Kehilat Yaakov synagogue Nov.18, 2014 in Jerusalem.

A blood splattered book lies on the floor at the scene of an attack on worshippers at the Bnei Torah Kehilat Yaakov synagogue by two Palestinians Nov. 18, 2014 in Jerusalem.

Members of the Israeli Zaka emergency response team clean blood from the scene of an attack at the Bnei Torah Kehilat Yaakov synagogue Nov.18, 2014.

A blood smeared floor inside the Bnei Torah Kehilat Yaakov synagogue where two Palestinians attacked worshippers Nov. 18, 2014 in Jerusalem. Four people, including three with dual American-Israeli citizenship, were killed and six wounded in the terror attack. The two Palestinian assailants were killed at the scene by police.

An ultra-orthodox Jew looks at a bullet hole in a drape covering the ark after an attack inside the Bnei Torah Kehilat Yaakov synagogue Nov. 18, 2014.

An Ultra-orthodox Jew leans on a religious Jewish text inside the Bnei Torah Kehilat Yaakov synagogue after an attack Nov. 18, 2014 in Jerusalem.

An Israeli rescue worker walks down bloody steps at the scene of an attack in the Bnei Torah Kehilat Yaakov synagogue in Jerusalem Nov. 18, 2014. Two Palestinians stormed the synagogue attacking worshippers praying inside with meat cleavers and guns.

Ultra-orthodox Jewish boys look at bullet holes in a window inside the Bnei Torah Kehilat Yaakov synagogue after an attack by two Palestinians earlier in the morning in the ultra-Orthodox Har Nof neighborhood in Jerusalem Nov. 18, 2014.

An Israeli forensic member stands near the body of one of two Palestinian assailants who were shot dead during an attack inside the Bnei Torah Kehilat Yaakov synagogue in the ultra-Orthodox Har Nof neighborhood in Jerusalem Nov. 18, 2014.

Ultra-orthodox Jewish women stand near the scene of an attack at the Bnei Torah Kehilat Yaakov synagogue Nov. 18, 2014 in Jerusalem.

An Israeli police officer scans a Jewish seminary near the scene of an attack at the Bnei Torah Kehilat Yaakov synagogue Nov. 18, 2014 in Jerusalem.

An ultra-Orthodox Jewish man prays as Israeli rescue workers clean the scene of a attack outside the Bnei Torah Kehilat Yaakov synagogue in Jerusalem Nov. 18, 2014.

Israeli security personnel run past a synagogue, where two Palestinians attacked took worshippers in Jerusalem Nov. 18, 2014.

An Israeli police officer gestures as he holds a weapon near the scene of an attack at the Bnei Torah Kehilat Yaakov synagogue Nov. 18, 2014 in Jerusalem.

A member of the Israeli Zaka emergency response team cleans blood from the ground at the scene of an attack at  the Bnei Torah Kehilat Yaakov synagogue Nov.18, 2014 in Jerusalem.

A Palestinian woman, in the southern Gaza strip area of Rafah, scatters sweets as she celebrates an attack on the Bnei Torah Kehilat Yaakov synagogue by two Palestinian men Nov. 18, 2014.

Masked Palestinians, in the southern Gaza Strip area of Rafah, hold axes and a gun as they celebrate the attack on the Bnei Torah Kehilat Yaakov synagogue by two Palestinian men Nov. 18, 2014. The synagogue attack is the deadliest such incident in six years in the holy city amid a surge in religious conflict.

A relative of Palestinian cousins Uday (L) and Ghassan Abu Jamal (R), both in their 20s, shows their portraits at the family's residence in the east Jerusalem neighborhood of Jabal Mukaber Nov.18, 2014, a few hours after the two men attacked and killed four Israelis. The attack began shortly before 7 am (0500 GMT) as worshippers were attending prayers at the Bnei Torah Kehilat Yaakov synagogue in the ultra-Orthodox Har Nof neighborhood of Jerusalem.

Ultra-Orthodox Jews mourn at the site where four rabbis were killed by two Palestinians, at the Bnei Torah Kehilat Yaakov synagogue in the ultra-Orthodox Har Nof neighborhood in Jerusalem Nov. 18, 2014.

Mourners gather for the triple funeral of Rabbi Kalman Levine, Avraham Goldberg and Arieh Kupinsky Nov. 18, 2014 in Jerusalem. Four Israelis were killed and eight injured after two armed Palestinian men from East Jerusalem attacked the Bnei Torah Kehilat Yaakov synagogue in West Jerusalem earlier in the day before being shot dead.

Israeli ultra-Orthodox Jews attend the funeral of Aryeh Kopinsky, Calman Levine and Avraham Shmuel Goldberg in Jerusalem November 18, 2014. Two Palestinians armed with a meat cleaver and a gun killed four worshippers, including Kopinsky, Levine and Goldberg in the Bnei Torah Kehilat Yaakov synagogue earlier in the day.

Mourners gather for the triple funeral of Rabbi Kalman Levine, Avraham Goldberg and Arieh Kupinsky Nov. 18, 2014 in Jerusalem. Four Israelis were killed and eight injured after two armed Palestinian men from East Jerusalem attacked the Bnei Torah Kehilat Yaakov synagogue before being shot dead.

Ultra Orthodox Jewish men attend the funeral of Rabbi Moshe Twersky, a U.S.-Israeli dual citizen Nov.18, 2014 in Jerusalem. Two Palestinians armed with a gun and axes burst into a Jerusalem synagogue and killed four rabbis before being shot dead.

Ultra Orthodox Jewish men carry the covered body of Rabbi Moshe Twersky during his funeral Nov. 18, 2014 in Jerusalem. Three of the victims, Rabbi Moshe Twersky, head of an English-speaking yeshiva, U.S. born Aryeh Kupinsky, 43, U.S. born Kalman Zeev Levine, 55, held dual US-Israeli citizenship, and one was a British-Israel citizen, U.K. born Avraham Shmuel Goldberg, 68.

Ultra Orthodox Jewish men attend the funeral of Rabbi Moshe Twersky Nov. 18, 2014 in Jerusalem. Two Palestinians armed with a gun and axes burst into a Jerusalem synagogue and killed four Israeli's before being shot dead. Three of the victims held dual US-Israeli citizenship and one was a British-Israeli citizen. Three of the victims, Rabbi Moshe Twersky, head of an English-speaking yeshiva, U.S. born Aryeh Kupinsky, 43, U.S. born Kalman Zeev Levine, 55, held dual US-Israeli citizenship, and one was a British-Israeli citizen, U.K. born Avraham Shmuel Goldberg, 68.

An Ultra Orthodox Jewish man cries during the funeral of Rabbi Moshe Twersky, a U.S.-Israeli dual citizen, Nov. 18, 2014 in Jerusalem. Two Palestinians armed with a gun and axes burst into a Jerusalem synagogue and killed four Israelis before being shot dead.