In April scores have died in a series of attacks and assassinations in Mexico, the Philippines and Nigeria. Catholics at prayer during Mass have been targeted in a number of attacks.
Since civil war began to rip apart South Sudan's fragile democracy in 2013, roughly one-third of the country's 12 million people have been forced to flee their homes.
Roman Catholic priests in eastern Congo are vowing to continue their work in parishes, schools and clinics after the murder of one of their brethren this week in the largely lawless region.