On the same day, First Vice President Amrullah Salehciting provisions of the Constitution of Afghanistandeclared himself caretaker President of Afghanistan and continued to claim to be the sole legitimate government representative of Afghanistan from the National Resistance Front of Afghanistan base of operations in the Panjshir Valley and vowed to continue military operations against the Taliban from there. On 6 September, as the Panjshir Valley reportedly fell to the Taliban, Ahmad Massoud went into hiding at a safe location, while Saleh is believed to have fled to Tajikistan. However, Mohammad Zahir Aghbar, the Islamic Republic of Afghanistan's ambassador to Tajikistan, disputed these reports.