NEW YORK – Authorities are ramping up their effort to solve a Manhattan mystery: Who drilled a hole into the home of a beef fortune heir and stole a collection of iconic artworks by Roy Lichtenstein and Andy Warhol?

The culprits also made off with surveillance video footage that might have caught them in the act.

The New York Police Department released images of the art on Thursday, hoping someone might help solve last month’s crime in the trendy Meatpacking District by recognizing works like a well-known Lichtenstein print called “Thinking Nude.”

Authorities estimate the five-story apartment was burglarized sometime during Thanksgiving week, when owner and art collector Robert Romanoff was away.

Also taken from the building was a Lichtenstein print called “Moonscape,” the Carl Fudge oil painting “Live Cat,” the Warhol prints “The Truck” and “Superman,” and a set of eight signed Warhol prints from 1986 called “Camouflage.” They’re among the artist’s last works before his death the following year.

Authorities estimate the artworks, plus stolen Cartier and Rolex watches and other jewelry, are worth about $750,000.

The Romanoff home is in a neighborhood filled with old warehouses now turned into retail and living space, restaurants and boutiques.

Police say the thief drilled a hole through the wall of a hallway between Nov. 24 and 28.

Royal family will celebrate Christmas without William, Kate

LONDON – Queen Elizabeth II and her family are gathering at Sandringham Estate to exchange gifts on Christmas Eve without Prince William, who’s on military duty.

The royals’ Christmas will include a Christmas Day church service at the estate, 110 miles north of London, followed by a gala meal and the broadcast of the Queen’s Christmas message.

William and his fiancee Kate Middleton won’t be there because William is on Royal Air Force duty in Wales. The couple plan to wed in April.

Buckingham Palace says Prince Harry isn’t on military assignment and is expected to be with the family at Sandringham.

The royal Christmas schedule is usually private except for the church service, which typically draws locals hoping for a glimpse of the queen and her family.

‘Spider-Man’ resumes as ‘a safer show now’

NEW YORK – It was a smooth landing for Spider-Man.

A day after Broadway’s costliest show was forced to cancel two performances following a scary fall by a stunt actor, “Spider-Man: Turn Off the Dark” resumed previews Thursday and came off without a hitch, including virtually all its complex aerial stunts.

“It’s a safer show now,” said a clearly relieved lead actor Reeve Carney, who plays Peter Parker and his alter ego, Spider-Man, as he signed autographs following the show.

Also all smiles was producer Michael Cohl. “If you weren’t nervous tonight, you’d have to be an idiot,” he said after the show. “I feel great.”

Before the $65 million show could resume Thursday with its nearly 40 aerial stunts intact, producers had to give final confirmation to the state Department of Labor that they had enacted certain safety measures. Among them: a requirement that a second person ensure the harnesses used by performers have been put on properly.

The show’s director and co-writer, Julie Taymor, credited the show’s injured actor, Christopher Tierney, with inspiring the cast to rise above recent troubles.

Tierney, doing a stunt as Spider-Man on Monday night, plunged from a ledge about 30 feet into a stage pit despite a safety harness that should have prevented the spill. Investigators are still looking into how it happened.