The scene outside the San Bernardino shooting. Photo: Screenshot.

At least two gun-wielding ­assailants opened fire on a holiday party for county employees Wednesday, killing 14 people in the deadliest mass shooting in the United States since the Sandy Hook Elementary School massacre three years ago this month.

Hours after the shooting, law enforcement officials said two suspects — Syed Rizwan Farook, 28, and Tashfeen Malik, 27 — had been killed in a police shootout several miles from the site of the original attack.

Read full story at The Washington Post.