NEW: An Afghan lawmaker accuses the U.S. of showing him a "fake" video of the suspect NEW: The Taliban say they are suspending an office designed for talks with the U.S. And a member of parliament accused the military of showing him and other officials "a fake video ... to convince the Afghan people that it was the act of only one soldier." Muhammad Naim Lalai said he was one of several Afghan officials shown a surveillance video on the soldier's base in Kandahar province. "We were shown a video in which a soldier climbs the wall of a military base and then goes indoors and pulls his bullet-proof jacket off and then puts his arms up to surrender himself," Lalai told CNN, expressing doubt that the video was genuine. The United States has not confirmed it showed footage from the base to Afghans. Also Thursday, the Taliban announced they were suspending an office they opened this year in the Gulf state of Qatar, designed to enable talks with the United States. Their e-mailed announcement did not say why they were closing the office. Still, the killings have provoked outrage, with the Taliban threatening to behead Americans. The Afghan protests and doubts came as U.S. Secretary of Defense Leon Panetta met with Afghan President Hamid Karzai in Kabul, where the subject of the killings and the recent burning of Qurans by U.S. troops was expected to top discussions. Karzai has called the shootings "acts of terror and unforgivable." Separately, 13 people were killed when a car hit a roadside bomb in Uruzgan province, police there said. The dead included nine children and four women, while two men were wounded, police spokesman Farid Ayell said, blaming the bombing on "the enemies of Afghanistan." It is not clear whether there is a link between the bombing and the weekend's shootings which are being blamed on the U.S. soldier. CNN's Larry Shaughnessy and journalist Ruhullah Khapalwak contributed to this report.