Eric Garner’s father is claiming a relative conked him in the head with a plastic soda bottle during his granddaughter’s funeral, police sources said Wednesday.

Ben Carr, 68, whose son was killed by police in 2014, sparking national protests, told cops Tuesday night the relative assaulted him during Monday’s funeral for Erica Garner, Eric Garner’s daughter, the sources said.

Carr told cops his granddaughter, 30-year-old Shadinee Snipes, was the person behind the bottle attack, although her motive is still unclear.

The grandpa was treated at Richmond County Medical Center after the encounter, sources said.

Gwen Carr, Eric Garner’s mom, has also filed a complaint against the same woman after Snipes allegedly grabbed Gwen by the coat and threw her to the ground, cops said.

Erica Garner, who became an activist for social justice after her father’s death, died on Dec. 30 in Brooklyn after suffering a massive heart attack.