The Trump administration expressed deep concern over U.S. nationals detained in Venezuela as reports come in that detainees are being prevented from communicating with their legal counsel and are being deliberately withheld food and medicine by the Maduro regime.

The Maduro regime has arrested five CITGO executives, all of whom are U.S. and Venezuelan dual citizens, on charges of corruption and conspiracy against the Venezuela regime over the last year. All five individuals, who hail from Texas, Louisiana, and Virginia, have reportedly lost significant amounts of weight and have been deprived of certain basic rights under Venezuela’s penal system, according to the Houston Chronicle.