California ? A gun linked to the slaying of an Oakland journalist was seized during raids early Friday targeting members of a Black Muslim group that operates a chain of bakeries, police said.

Colleagues said Oakland Post editor Chauncey Bailey, 57, had been working on a story about Your Black Muslim Bakery before he was ambushed and killed Thursday morning in downtown Oakland. Witnesses said a masked gunman shot Bailey near the county courthouse about 7:30 a.m. Thursday and fled.

Oakland Police Lt. Ersie Joyner said he believes the seven people arrested Friday include those responsible for Bailey’s death. Police say that they still do not have a motive for Bailey’s killing.