SAN BERNARDINO, Calif. — Survivors of a terrorist attack that killed 14 people at a holiday party east of Los Angeles observed the fifth anniversary of the assault on Wednesday, and officials unveiled plans for a memorial to honor the dead.

A private memorial ceremony that also included families of the slain was held outside the San Bernardino County Government Center, where the memorial will be built, a county statement said.

Family members laid white roses at the site, the San Bernardino Sun reported.