A plane crash in San Diego that likely killed six people, including groundbreaking alternative music executive Dave Shapiro, happened as the private plane approached an airport whose runway lights were out in heavy fog,

Tributes were pouring in across social media Thursday for music agent Dave Shapiro and drummer Daniel Williams, who were both believed to be involved in the deadly plane crash in a Murphy Canyon neighborhood.

Shapiro, who co-founded music agency Sound Talent Group, was a well-known and respected figure in the rock and metal scene, credited with helping many alternative bands find audiences in the mainstream. Some of his clients include major acts like Sum 41, Pierce the Veil, and The Devil Wears Prada.