WASHINGTON - The US State Department said on Friday it was 'concerned' about the case of two Libyan-American businessmen charged by the United Arab Emirates with supporting Libyan militants amid allegations they were tortured into signing a confession. State Department spokesman Mark Toner said the case of Kamal Eldarat and his son, Mohamed Eldarat, had been raised with UAE officials by the US ambassador. A verdict in the case was expected on Monday. Toner said U.S. officials would be present. The Eldarats were initially charged with terrorism-related offenses, but the prosecutor in March changed the charges to providing support to Libyan militants and collecting donations without state permission. They face up to 15 years in prison.