The Federal Aviation Administration extended “temporary flight restrictions” over Bedminster, N.J., including President-elect Donald Trump’s golf club, due to an influx of mysterious drone sightings.

The FAA originally had the restrictions over the area active until Dec. 6, but it ultimately got renewed the day it was meant to expire.

The new restrictions are now in effect until Dec. 20.

The drones, which have been spotted on Staten Island the past several days, first appeared in New Jersey.

FBI agents in New Jersey are looking into the neighboring state’s occurrences, which New Jersey police began to investigate on Nov. 18, NJ.com said.

“Reports have been filed with police about drones in Mendham Borough, Mendham Township, Morristown, Morris Township, Chester, Randolph, Rockaway, Morris Plains, Dover and Parsippany in Morris County. Authorities in Hillsborough and Branchburg in Somerset County, and communities in Warren County, have also received reports,” NJ.com reported.

Though their origin is a unknown, New Jersey “law enforcement officials said the drones are not a threat to residents.” However, they were described as “nefarious in nature” by Florham Park Police Chief Joseph Orlando, as reported by Newsweek.

Former Air Force Sergeant Walter Ziegler of New Springville told the Advance/SILive.com that he spotted some of the drones from his apartment building with binoculars.

He described them as having “a white light in the center and a red light on each side.” By his estimation, he believes the span of the drone is about 15-feet-long. They came “within a mile or less” of his apartment, he said, and “they were all stringed out.”

The most he observed in a single instance “was five or six.”

This aligns with Advance/SILive.com’s sister site, NJ.com’s, reporting which describes a few drones as “unusually large, according to the reports.”

Ziegler added that the drones spotted at Howland Hook “were in the glide path” of Newark International Airport.

“When the aircraft actually got close to them, the lights shut off, and when the aircraft passed them, the lights came on again and started following the aircraft towards the airport,” he explained.

Using apps, Ziegler was able to determine that the drones were not helicopters as they lack the transponders usually aboard a helicopter. While he isn’t sure if they are military related, he said that if they were military, “they wouldn’t have their transponders on anyway.”

The drones will hover over a location for any given amount of time before moving off.