ATA-BEIIT (Reuters) - The United States stopped all troops flying to Afghanistan via its Kyrgyz air base as security concerns persisted on Saturday following an uprising in the impoverished Central Asian republic. The fate of the Manas base, a central cog in the US-led war effort in Afghanistan, has been thrown into question since the overthrow of President Kurmanbek Bakiyevs government. Up to 10,000 mourners gathered on the edge of the burnt-out Kyrgyz capital at a funeral to commemorate at least 78 people who were killed when troops loyal to Bakiyev shot into crowds of opposition protesters on Wednesday during the uprising. US military Central Command, which oversees the Manas base in Kyrgyzstan, said all military passenger flights had been suspended and that cargo flights were not guaranteed. Decisions on conducting other, non-passenger-related, flight operations from the base will be made on a case-by-case basis, a spokesman for Central Command said. A US official, speaking on condition of anonymity in Washington, said it was a security-related decision made by the base commander on the ground at Manas. A spokesman for the US base declined to say when troop flights would resume or what alternative routes would be used. Pentagon officials say Manas is central to the war effort against the Taliban, allowing around-the-clock flights in and out of neighbouring Afghanistan. About 50,000 troops passed through last month alone. Lieutenant-Colonel Tadd Sholtis, a spokesman for the commander of US and NATO forces in Afghanistan, said the disruption at the Kyrgyz base was not yet having a significant impact on operations on the ground. Its only been a couple of days, Sholtis said. Its not concerning at this time. It would be if it went on for a long time. The uprising in Kyrgyzstan, where a third of the 5.3 million population lives below the poverty line, forced the president to retreat to his stronghold in the south of the country. His exact whereabouts are unclear. Mourners at the funeral on the outskirts of Bishkek showed little sympathy for Bakiyev. Carrying coffins draped in the red-and-yellow Kyrgyz national flag, they clutched portraits of the dead at a memorial complex built in honour of the victims of mass executions ordered by Soviet leader Josef Stalin in the 1930s. Relatives lowered bodies into 16 graves lined in rows and joined hands in prayer, while mullahs chanted in Arabic. Those who died on April 7 are the heroes of Kyrgyzstan, Roza Otunbayeva, the interim government chief, told the crowd. It was our duty to establish justice. Those who are being buried here today are all our children, the children of Kyrgyzstan. Omurbek Tekebayev, a key figure in the provisional government, told the crowd: Our people defeated the dictator. Kuat Niyazbekov said his brother had died in the uprising.