LOS ANGELES — It was a daring and elaborate escape: cutting through metal, crawling through plumbing tunnels, climbing a roof, rappelling four stories to freedom using ropes made from bedsheets.

But this wasn’t a Hollywood movie; it was a real-life breakout that left authorities struggling to find three escapees — one an alleged killer — and put together the pieces of how they managed to thwart security at a Southern California maximum-security jail.

The priority was finding the men — whom are possibly armed and considered dangerous — but a probe also is underway to see whether the men had any help from inside or outside the Orange County Men’s Central Jail, authorities said Sunday.

Jonathan Tieu, 20; Bac Duong, 43, and Hossein Nayeri, 37, were all awaiting trial for violent crimes but their cases were unconnected. They vanished from a dormitory they shared with around 65 other men on Friday shortly after the 5 a.m. inmate head count, county sheriff’s officials said.

Somehow, the men obtained tools that allowed them to cut through the quarter-inch-thick grill on a dormitory wall, then got into plumbing tunnels. Cutting their way through additional half-inch-thick steel bars, the trio made their way to an unguarded area of the roof of the four-story building, where they apparently moved aside some razor wire and rappelled to the ground using elaborately braided ropes made from linens, authorities said.