The Speaker of the Palestinian parliament has been arrested by Israeli soldiers, Hamas officials said.
A spokesman said Abdel Aziz Duaik was arrested near Ramallah.
The Israeli military refused to comment.
The Palestinian parliament has not functioned since Hamas seized control of Gaza in 2007 from the rival Palestinian Fatah Party.
Since then the Western-backed Fatah governs the West Bank while Hamas rules Gaza.
Israel, the US, EU and others list Hamas as a terror group due to its suicide bombings and other attacks aimed at Israeli civilians that killed hundreds.
Mr Duaik was arrested along with other Hamas officials in 2006 after militants abducted an Israeli soldier. He was released in 2009.