The United States, grappling with how to counter the spread of Taliban militants on both sides of Afghanistan-Pakistan border, is turning to Saudi Arabia for help. But so far the kingdom seems wary of diving into the thorny conflict. Pakistan will be on the agenda when President Barack Obama meets with Saudi King Abdullah in Riyadh on Wednesday, according to Mark Lippert, deputy national security adviser. Obama's defense secretary, Robert Gates, has already asked the Saudis for help in staving off the spread of militants in Pakistan and encouraging Pakistani officials to work together in countering the terrorist threat. Saudi Arabia holds a special religious status as the land of Islam's two holiest cities, Mecca and Medina. Afghan President Hamid Karzai has repeatedly asked Saudi Arabia to mediate between his government and the Taliban. Abdullah held a secret meeting with Afghan officials and former Taliban government members in Mecca last September to explore the possibility of mediating reconciliation talks, said Abdul Salam Zaeef, the Taliban's former ambassador to Pakistan, who attended the meeting. Saudi Arabia has contact with Taliban leader Mullah Omar and other militants in Pakistan and Afghanistan, according to Arsala Rahmani, a former Taliban deputy higher education minister, who also attended. If Saudi Arabia can't convince the Taliban to negotiate, nobody can,'' said Rahmani. But many experts believe the Taliban won't be ready to strike a deal that is acceptable to Afghanistan, Pakistan and their allies until they lose momentum on the battlefield. The Saudis have insisted they are doing all they can to rein in terror financing. Many experts believe they could do more but say the Saudis are wary about angering religious conservatives in the country who are key government supporters.