Palestinian security forces in the West Bank recently arrested a Hamas cell that planned a suicide attack in Israel, Palestinian Foreign Minister Riad Malki said Monday. A videotape showing a suicide bomber detailing his intentions to blow up an Israeli target was also seized, Malki said at a news conference. The announcement came a week before US President George W. Bush visits the region to promote peace talks between Israel and the Palestinians. The Palestinians are eager to prove that they are fulfilling their obligation to the road map plan to crack down on terrorists as a precondition for final-status negotiations with Israel. "We confiscated huge amounts of mercury in Nablus," Malki told reporters. "This mercury is used for explosives and especially in preparing detonators," he said. Malki refused to elaborate or answer reporters' questions about the incident. He did not show the videotape to reporters or release the name of the alleged bomber. The IDF said it had no knowledge of the case.