 Towards midnight on May 1, two bombs exploded in Yale's Ingalls Rink, where a concert was being held in conjunction with the protests.Although the rink was damaged, no one was injured, and no culprit was identified.Yale chaplain William Sloane Coffin stated, "All of us conspired to bring on this tragedy by law enforcement agencies by their illegal acts against the Panthers, and the rest of us by our immoral silence in front of these acts," while Yale President Kingman Brewster Jr. issued the statement, "I personally want to say that I'm appalled and ashamed that things should have come to such a pass that I am skeptical of the ability of Black revolutionaries to achieve a fair trial anywhere in the U.S." Brewster's generally sympathetic tone enraged many of the university's older, more conservative alumni, heightening tensions within the school community.