The pilot of the private jet that crashed early Thursday morning in Tierrasanta, killing all six people on board and injuring eight people on the ground, did not declare an emergency or call in any type of mechanical issue with the plane before it clipped a power line and slammed into a residential street, federal authorities said Friday.

The investigation will continue Friday into why a Cessna 550 plunged into a Murphy Canyon neighborhood, killing all six aboard the plane.

A small plane crashed in the Murphy Canyon neighborhood, near Tierrasanta, early Thursday morning, prompting a major emergency response.