Carter to meet Meshaal
The US-based Carter Center did not confirm the meeting or "any specifics" in Carter's undisclosed itinerary.
But Sean McCormack, the US state department spokesman, said on Thursday the former US leader was "counselled" against meeting any Hamas representatives because it went against US foreign policy of isolating the group.
'Study mission'
The Carter Center said the ex-president was leading a study mission as part of his efforts to "support peace, democracy and human rights" in the Middle East.
"This is a study mission and our purpose is not to negotiate but to support and provide momentum for current efforts to secure peace in the Middle East," it said in a statement.
"Our delegation has considerable experience in the region, and we go there with an open mind and heart to listen and learn from all parties."Israel, which also calls Hamas a terrorist organisation, has expressed concern over the meeting, which would be the first public contact between a US leader and Hamas officials in two years.