President Bush meets with the presidents of Afghanistan and Pakistan later on Wednesday to discuss rising tensions over violence in Afghanistan.
The three-way White House meeting comes after Afghan President Hamid Karzai and Pakistani President Pervez Musharraf criticized each other's efforts to fight terrorists.
A spokesman, Tony Snow, for President Bush said on Wednesday there are tensions between the two countries. He said Mr. Bush will stress that Afghanistan and Pakistan share common goals, including seeing fugitive al-Qaida leader Osama bin Laden brought to justice.
Earlier this week, Mr. Karzai accused Pakistan of allowing what he called future terrorists to study at Islamic seminaries (madrassas) in Pakistan.
Mr. Karzai is also skeptical of a recent agreement between Pakistan's government and tribal elders along the border with Afghanistan aimed at stopping cross border attacks.
Mr. Bush's spokesman said the president is satisfied with Pakistan's efforts to defeat terrorism.
Mr. Musharraf said on Tuesday that Mr. Karzai does not understand his own country and that terrorism there is fueled by disaffected ethnic Pashtuns.
President Bush is expected to emphasize Washington's long term commitment to the region's security.
In other news, new details are being reported about allegations in Mr. Musharraf's memoir, "In the Line of Fire".
In the book, Mr. Musharraf says that the alleged mastermind of the September 11th attacks on the World Trade Center, Khalid Sheikh Mohammed, participated in the murder of U.S. journalist Daniel Pearl.
Mr. Pearl was kidnapped in Pakistan in January 2002. He was murdered some weeks later.
Khalid Sheikh Mohammed is in U.S. custody.