(Lauren Evans) [UPDATE BELOW] A reporter for the Wall Street Journal has been missing from his New Jersey home since Saturday afternoon.

55-year-old David Bird, an energy markets reporter for the paper, left his home in Long Hill Township around 4:30 p.m. to take a short walk, according to several reports. When he didn't return after two hours, his wife called the police. Search efforts have included dozens of volunteers, as well as helicopters, horses, ATVs and even divers enlisted to scour the Passaic River.

Bird and his wife, Nancy, had been putting away Christmas decorations when Bird decided to take a stroll before an imminent rain storm. He left the house wearing a red rain jacket, but opted not to bring his cell phone, nor the medication he's taken twice a day since receiving a liver transplant. Nancy told police that her husband had been suffering from a stomach bug, but was on the mend. He was an avid hiker and outdoorsman who lead Boy Scout troops and ran the New York City Marathon in 2013.

"This is so unlike him it's unbelievable to me," friend and fellow Boy Scout troop leader Jim Caparoso told the paper. "If he was stuck somewhere, he knows how to shelter himself enough out of the elements. He knows how to signal if he can."

Anyone with has information about David Bird's whereabouts can call the Long Hill police at (908) 647-1800.

Update, 3 p.m.: According to NBC, David Bird's credit card was used in Mexico on Wednesday night, leading to speculation that his disappearance might be connected to his coverage of OPEC.

However, a "family spokesman" told the Post that the report was just one of several rumors.

Read More: Gothamist

Photo Credit: Long Hill Township Police Department