5:56 PM PT -- Brittany Byrd went to the West Hollywood Sheriff's substation Friday afternoon and filed a police report alleging Uzi, her ex-bf, put a gun to her stomach and then struck her.
3:19 PM PT -- It now appears that Lil Uzi Vert rolled up to Dialog Cafe because SAINt JHN was there with Uzi's ex, Brittany Byrd. Sources connected to Brittany tell TMZ, she and SAINt JHN were there discussing a business project, when Uzi jumped out of an Escalade and confronted everyone at the table and then got into it with JHN.
The sources say Uzi threw a punch at JHN and missed ... he fell down and his gun fell out on the ground. We're told that's when Brittany got up from the table and approached him and he allegedly pushed the gun into her stomach and allegedly struck her. Everyone left the scene and we're told she's going to a hospital and then planning to file a police report.
Rapper SAINt JHN was allegedly confronted Friday by Lil Uzi Vert ... and all hell broke loose when Vert allegedly flashed his gun.
Eyewitnesses tell TMZ ... SAINt JHN was at Dialog Cafe in West Hollywood at high noon when Lil Uzi Vert jumped out of a Cadillac Escalade and confronted JHN. We're told they got into a physical altercation.