A small plane crashed Saturday in the Amazon with 20 people on board - 16 of whom are still missing, a Brazilian official said. The plane went down in a river about 80 kilometers southwest of state capital Manaus, said a spokesman for the Amazonas state government, who spoke on condition of anonymity in line with department policy. Another official confirmed the crash to a local news outlet. "The survivors said they saw one of the motors of the plane stop," Daniel Guedes, a police official in the city of Manacapuru near the crash site, told the Internet news portal Terra. The plane - being used as an air taxi, a common practice in the thick jungle areas of Brazil - crashed into the Manacapuru river about 3:30 p.m. Saturday.