"Let us pray for the victims -- at least 50 of them -- and the missing, especially the children, struck by the violent tornado that hit Oklahoma City yesterday. Hear us, O Lord," the pope said during the prayers of the faithful.
The tornado touched down at about 3 p.m. local time in Oklahoma and reportedly stayed on the ground for more than 40 minutes, leaving a 20-mile path of death and destruction. By midday Rome time May 21, news reports were saying at least 91 people, including 20 children, died. Two elementary schools were struck by the tornado.
A few hours after the Mass, Pope Francis also used his @Pontifex Twitter account to express his concern for the Oklahoma victims and survivors.
"I am close to the families of all who died in the Oklahoma tornado, especially those who lost young children. Join me in praying for them," he told the 2.5 million people who follow his English-language Twitter account and the 2.4 million who follow his Spanish-language account.