Was traveling from veracruz to df last week by Ado when a Mexican inm official boarded the bus,it seemed like he singled out any non mexican looking folks for scrutiny.The young lady from Colombia seated beside me was asked for her papers as was I,a black couple were also singled out,they were removed from the bus.I was returning from the border on a visa run,ordinarily i would not have my passport with me on a bus journey,Might be wise to do so.