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.

Daniel Williams, who played with the Christian metal-core group for years before his departure in 2016, was on a private jet that crashed into San Diego’s Murphy Canyon neighborhood at around 3:45 am local time Thursday. His father, Larry, confirmed to TMZ that he was on the flight and likely dead.