Assad: Syrian rebels will be defeated (AP) BEIRUT - The Syrian president said in remarks published Friday that he is adamant his regime will not fall and he also lashed out at Gulf countries, which he accused of using their enormous oil wealth to try to drive him from power. Bashar Assad's comments came as an opposition group, the National Coordination Body for Democratic Change in Syria, accused the regime of being behind the disappearance of two of its leaders. Abdul-Aziz al-Kheir and Ayas Ayyash were expected to take part in a conference Sunday in Damascus by some 20 Syrian groups that are calling for Assad to step down. But they disappeared Thursday along with a friend who had picked them up at Damascus International Airport, the group said. The group's head, Hassan Abdul-Azim, told The Associated Press by telephone that the regime was believed to be behind the disappearance. Syria's crisis began in March last year with anti-government demonstrations demanding reforms. The protests were met with a brutal crackdown by the regime. Syria later became embroiled in a civil war between forces fighting for Assad and those trying to topple him. The violence has killed more than 23,000 people so far, according to activists. In the interview with the Egyptian weekly Al-Ahram Al-Arabi, Assad said the rebels "will not succeed" and that a foreign military intervention such as the one that helped topple Libyan leader Muammar Qaddafi will "not be repeated" in Syria. Assad also launched one of his harshest attacks on Saudi Arabia and Qatar, which have been among his strongest critics and backers of the opposition, saying they are trying to influence the region with their money. "They think their money can buy geography, history and a regional role," Assad said. "They are giving terrorists weapons and money with hope of repeating the Libyan model," Assad added. Instead of helping regional stability they are supplying armed elements with weapons and training in order to weaken the Syrian state. Syria TV: Helicopter clipped tail of passenger jet Syrian rebels seize control of border crossing on frontier with Turkey Syria rebels seize Turkey border crossing The upheaval in Syria presents an opportunity for the Gulf's Sunni rulers to bolster their influence and possibly leave Shiite powerhouse Iran without its critical alliances that flow through Damascus. Assad's regime, which is allied strongly with Iran, is led by the minority Alawite sect, an offshoot of Shiite Islam Syria's ties with the Gulf nations have been strained in the past - Assad once called Saudi King Abdullah and other Arab leaders "half men" for being critical of Hezbollah over the 34-day war between the Lebanese Shiite militant group and Israel in 2006. In the interview, Assad added that the only way to solve the Syrian crisis is through "dialogue with the opposition" and that the "door for dialogue is open."