Catholics in Ukraine said people fear a full-scale war with Russia, after a naval confrontation prompted the imposition of martial law in Ukraine's eastern regions.
A dozen men organized round-the-clock guard duty, worried that nationalist radicals might make their third attempt in a year to seize the place of worship.
The Russian Orthodox Church decided Monday to sever ties with the leader of the worldwide Orthodox community after his decision to grant Ukrainian clerics independence from the Moscow Patriarchate.
He is the second pope to visit these Baltic nations. John Paul II came to the region in September 1993, after the collapse of communism, and was welcomed as a hero. Pope Francis comes exactly 25 years later, but much has changed since that first papal visit.