The new Hamas leader has made his first public appearance, visiting people expressing solidarity for hunger-striking Palestinian prisoners held by Israel.
Ismail Haniyeh stopped by a tent containing the supporters on Monday, two days after Hamas announced that the former Gaza prime minister had replaced Qatar-based Khaled Mashaal in the Islamic militant group's top position.
Haniyeh's rise was the latest sign of a power shift in Hamas from the diaspora to Gaza, which has been under Hamas rule since a 2007 takeover.
The shift comes at a time of growing financial pressure on Gaza by Hamas' main rival, Western-backed Palestinian President Mahmoud Abbas, who is trying to force the group to cede ground.
Haniyeh also faces movement restrictions that could limit his leadership role. An Israeli-Egyptian border blockade has largely sealed Gaza since 2007.