The President of Pakistan, Pervez Musharraf, has made a scathing attack on his Afghan counterpart Hamid Karzai.
General Musharraf accused Mr Karzai of being oblivious to intelligence operations in his own country.
He said information that Mr Karzai had passed onto him last month, indicating that the Taliban leader, Mullah Mohammed Omar was hiding in Pakistan, was old and useless.
US President George W Bush visited both major allies last week and US Secretary of State Condoleezza Rice said the United States was trying to promote co-operation between the often uneasy neighbours.
Afghanistan is facing an increasingly vicious insurgency by the Taliban, which has been fighting since it was ousted shortly after the 11 September attacks when Pakistan dropped support for the radical Islamists.
Although Pakistan officially ended its support, many Afghans are convinced the Taliban could not survive and fight without the benefit of Pakistani refuge from where it plots and launches attacks into Afghanistan.
Pakistan has long rejected such accusations.
Mr Karzai visited Pakistan last month and handed over what Afghan officials said was detailed information about Taliban members and activities in Pakistan, including telephone numbers and the location of supreme leader Mullah Mohammad Omar.
