Pope Francis on Wednesday railed against immigration policies that force many underground and into the hands of drug gangs and human smugglers, praying at Mexico's border with the United States.
Priests in El Salvador have been prohibited from studying at secular universities, in order to avoid the temptation of worldly desires, according to NDTV.
The Pope will be driven to the fence that separates Mexico from the United States, and will celebrate Mass just 80 yards (73 meters) from the crossing.
Pope Francis told indigenous Mexicans that today's world "needs you!", denouncing their systematic exclusion from society and encouraging the use of native languages in Catholic worship.
It was widely reported last week that new bishops undertaking a Vatican course were told that they were not obliged to report abuse when it was discovered.
Pope Francis called on Mexico's government on Saturday to fight endemic corruption and drug trafficking and he then prayed with thousands before the icon that unites the country - the Virgin of Guadalupe.
Pope Francis and Russian Orthodox Patriarch Kirill called for restored unity in a historic meeting in Cuba, nearly 1,000 years after the Eastern and Western churches split.
U.S. Republican presidential front-runner Donald Trump is not pleased with Pope Francis' plan to stand with migrants at the U.S.-Mexican border on Friday, saying the head of the Roman Catholic Church "doesn't understand" America's immigration problem.