Argentine President Alberto Fernandez insisted Saturday that a cargo plane with Iranian and Venezuelan crew members had been grounded due only to fueling difficulties, not because of any alleged link to Iran's elite Quds Force.There is "no irregularity" with the Venezuelan plane, Fernandez told Radio 10, adding that the sole problem was refueling difficulties linked to US sanctions on Venezuela. Paraguay's intelligence chief had said Friday that one man aboard the plane, which has been grounded since Wednesday at an airport near Buenos Aires, had ties to the Quds Force.