MEXICO CITY (Reuters) - Mexico’s government has expressed “profound discontent” to U.S. officials for not informing their Mexican counterparts of plans to arrest former defense minister Salvador Cienfuegos, Foreign Minister Marcelo Ebrard said on Thursday. Cienfuegos, who was head of the army from 2012 to 2018, was arrested earlier this month at Los Angeles International Airport on charges of drug trafficking and money laundering, and is being held in U.S. custody without bail. The Mexican government said there had been no prior open probe of Cienfuegos in Mexico, where the army has long been regarded as a key pillar of stability. U.S. legal documents published after his detention suggested that Cienfuegos had been under investigation for some years, and he was formally indicted with a New York court in August 2019.