More than two dozen trucks loaded with food, aid and commercial goods intended for the Gaza Strip were stranded on the Egyptian side of the border Thursday, leaving truckers with little to do but sip tea and exude frustration. Egyptian officials have not explained why trucks have had trouble crossing into Gaza through the country's Rafah border crossing. "We don't know why, but it (the border) is closed," said an Egyptian border official Thursday, speaking on condition of anonymity because he was not authorized to talk to the media. More than dozen trucks packed with white sacks of food were stranded inside the Egyptian crossing terminal Thursday. Another dozen trucks were lined up outside the crossing, and the drivers said they didn't know when they will be allowed in or why they were denied entry.