San Diego: Two small planes have collided midair while approaching an airport in San Diego County, killing at least four people and sparking brush fires in a remote field where the wreckage landed, authorities said.

The collision occurred at about 11 am yesterday, Federal Aviation Administration spokesman Ian Gregor said. Both planes - a twin-engine Sabreliner jet and a single-engine Cessna 172 - were approaching Brown Field,
Gregor said.