Federal agents have reportedly forced a plane with at least four illegal immigrants aboard to land at a central Texas airport. Newspaper and broadcast reports say five people, including the pilot, will face questioning in connection with a possible smuggling operation. A San Antonio police commander tells the San Antonio Express-News the five are under investigation in connection with a smuggling operation involving Chinese nationals. The newspaper says the five were flying illegally in American airspace in a single-engine Cessna south of San Antonio when they were intercepted. There's been no comment yet from the Homeland Security Department, FBI or Federal Aviation Administration. A San Antonio television and radio station quotes authorities as saying that those aboard the plane appear to be Chinese.