The first U.S. humanitarian airlift to Iraq has been postponed by a day until Tuesday.

Marry Harrison of AmeriCares, the humanitarian group sponsoring the airlift, suggested the delay resulted from negotiations over chartering cargo planes to fly the shipment from Amman to the Iraqi capital Baghdad."It is purely logistical reasons because we are calculating the most cost-effective way to airlift humanitarian aid to Iraq," she said without elaborating.

The Connecticut-based AmeriCares, known for targeting hard-to-access crisis areas, had planned to ferry about 35 tons of medicine and nutritional goods to Iraq on Monday using Jordanian cargo planes.

Going along on the much-publicized flight as a volunteer will be actor Val Kilmer.