The National Council of Churches of Christ of the USA coordinated a weighty statement on behalf of itself and four of its largest member denominations (those whom, the statement notes, they were able to reach in a timely manner).  The statement, over the signatures of  Rev. Dr. Michael Kinnamon, General Secretary, National Council of the Churches of Christ in the USA; Rev. John H. Thomas, General Minister and President, United Church of Christ; Rev. Clifton Kirkpatrick, Stated Clerk of the General Assembly, Presbyterian Church (USA); Bishop C. Christopher Epting, Deputy for Ecumenical and Interfaith Relations, The Episcopal Church; and The Rev. Mark S. Hanson, Presiding Bishop, Evangelical Lutheran Church in America, noted that:

 As leaders of Christian communities in the United States, we are shocked by the attack on the Mercaz Harav Yeshiva in Jerusalem, and saddened that violence has claimed yet more human lives in Israel.  We pray for all of those who have died, and for their families and loved ones and also for the other students at the seminary, who will carry the scars of this horror for the rest of their lives. 

I also received a very powerful, personal note from Bishop Hansen, expressing his own condolences.

Leaders of the World Conference of Religions for Peace issued a significant statement (available here) as well.  HRH Prince el Hassan bin Talal, President Emeritus, Religions for Peace, Jordan; Rabbi Dr. Walter Homolka; Principal of Abraham Geiger College at the University of Potsdam,Germany; and Dr. Hans Küng, President, Global Ethic Foundation, Switzerland said:

Holy places must not be abused to incite violence or express hatred. Attacking holy spaces is one way that extremists violently abuse religion. Moderate voices are increasingly unheard. All who oppose violence must not remain silent or be indifferent toward human suffering.

Reuters reports that Pope Benedict also spoke of the bombing (indirectly, as is the Vatican style in such matters) during his public remarks yesterday, saying:

 In recent days, violence and horror have once again bloodied the Holy Land, feeding a spiral of destruction and death which seems to have no end…." "I encourage the Israeli and Palestinian authorities in their intention to continue to construct, through negotiation, a peaceful and just future for their peoples," Benedict said after his weekly Angelus blessing. “And I ask, in the name of God, (for people) to leave the torturous paths of hate and revenge and responsibly to take the roads of dialogue and faith."