Our take: Rev. Rob Morris issued an apology for participating in an interfaith prayer vigil following the Sandy Hook massacre because his church bars its clergy from worshiping with other faiths.

A Connecticut Lutheran pastor has apologized for participating in an interfaith prayer vigil for the 26 children and adults killed at a Newtown elementary school in December because his church bars its clergy from worshiping with other faiths.

The December prayer vigil was attended by President Barack Obama, leaders from Christian, Muslim and Jewish faiths, and relatives of the 20 first graders who were gunned down in their classrooms two days earlier after a gunman entered their school.

The Dec. 14 shooting shook the nation and led to calls for improved school security, gun control and better mental health care.

The pastor, Rob Morris of Newtown's Christ the King Lutheran Church, provided the closing benediction at the interfaith event.

Earlier this month, the president of the Lutheran Church-Missouri Synod, Pastor Matthew Harrison, wrote a letter to church members saying he had requested an apology from Morris for his participation in "joint worship with other religions."