It's not a very good week to be a Hollywood sibling, with the Russian roulette death of Scott Ruffalo followed soon afterward by Dakota Culkin's fatal encounter with a moving vehicle.

"Law enforcement sources tell us Dakota Culkin was walking on the west side of Los Angeles Tuesday when she stepped off a curb and was struck by a car," reports TMZ. "The 29-year-old Culkin was taken to the UCLA Medical Center where she died of her injuries yesterday afternoon." Dakota was the elder of two Culkin-clan daughters, adds The Huffington Post. We send our condolences to Macaulay, Rory and the rest of their family, and urge Clint Howard to stay indoors until this whole trend blows over.

[Photo: HuffPo]