D4vd and Nick Reiner are sharing a roof over their heads … they’re locked up in the same Los Angeles County jail.
The singer — who is charged with murdering 14-year-old Celeste Rivas — has been transferred to Twin Towers Correctional Facility in Downtown Los Angeles … according to online records.
Our law enforcement sources tell us D4vd was transferred there because authorities want him under better supervision because he’s a celebrity inmate at the center of a high-profile case.
We’re told D4vd has been placed in administrative segregation … he is not on suicide watch.
Nick has been at Twin Towers since at least December, as he awaits trial for the double murders of his parents, Rob and Michele…