Oakland, Calif. ? A man linked to a black Muslim group was among two men who turned themselves in to police Tuesday for their roles in vandalizing a pair of stores for selling alcohol to blacks, police said.

Investigators said it was too soon to say whether the vandals were connected to Monday’s fire and kidnapping of clerk at the same store ransacked by a gang of black men in suits and bow ties three days earlier.

Yusef Bey IV, 19, and Donald Cunningham, 73, turned themselves in, Oakland Deputy Police Chief Howard Jordan said.

No arrests have been made in the kidnapping or the fire. Store employee Abdel Hamdan was found safe in the trunk of a car Monday, about 12 hours after the fire, as police sought to get to the bottom of the attacks.

Last week, Hamdan’s store and the nearby San Pablo Liquor store were vandalized by about a dozen men who smashed liquor bottles and toppled food racks while demanding that both stores stop selling alcohol to black people, authorities said.