A Frontier Airlines flight was forced to make an emergency landing after horrified passengers heard a beeping noise coming from the cargo area.
Flight 4708 was traveling from Washington D.C. to Atlanta, Georgia around 2.30pm Wednesday, when the odd noise was heard during the flight.
The aircraft landed at Dulles International Airport in Virginia and parked away from the main terminal to 'undergo a precautionary security search,' the airline told 7News.
Passengers deplaned the aircraft and will be allowed to retrieve their bags once the search is over, the airline said.
Police dogs were seen searching the cargo area on the tarmac while several emergency vehicles stood by.
The search was done 'out of an abundance of caution,' the Metropolitan Washington Airports Authority (MWAA) said. All other flights are operating normally, they added.
A spokesperson with the Federal Aviation Administration (FAA) told DailyMail.com the agency is investigating the matter.

A Frontier Airlines flight traveling from Atlanta, Georgia to Washington D.C., had to make an emergency landing after passengers heard a beeping noise coming from the cargo area

Police dogs were seen searching the cargo area on the tarmac while several emergency vehicles stood by
DailyMail.com contacted Frontier Airlines for more information.
News of this emergency landing comes just a week after an Alaska Airline flight bound for Las Vegas, Nevada from Portland, Oregon, had to stop to return to Portland International Airport after passengers and crew reported smelling 'fumes in the cockpit and cabin' shortly after takeoff.
Passengers reported seeing flight attendants moving rapidly through the cabin and hearing the pilot announce a 'concerning smell' on April 3.
Flight 757, a 14-year-old Boeing 737-800, landed safely at approximately 9:50am.
Upon landing, fire and rescue personnel evaluated the aircraft and provided medical assistance to nine individuals. No serious injuries were reported.
Videos captured by passenger Angela DeHaven and posted on TikTok showed emergency crews on the tarmac and inside the aircraft.
While initial reports indicated a potential evacuation, passengers ultimately disembarked normally.
Alaska Airlines stated that the aircraft was taken out of service for inspection and that passengers were rebooked on a replacement aircraft.
DeHaven described the scene to local ABC affiliate KATU: 'You could see the flight attendants kind of hurriedly go to the back of the plane and then very hurriedly come back up to the front.'

An Alaska Airline flight bound for Las Vegas, Nevada from Portland, Oregon, had to stop to return to Portland International Airport after passengers and crew reported smelling 'fumes in the cockpit and cabin' shortly after takeoff on April 3

Alaska Airlines stated that the aircraft was taken out of service for inspection and that passengers were rebooked on a replacement aircraft. (Pictured: Stock image)
'I had a heightened anxiety level as we were heading back down because between them diverting and landing, you don't know what's wrong. It was definitely an eye opening moment.'
In the comment section of her TikTok, DeHaven said the airlines told her the cause of the fumes was a result of 'the chemical they spray on the jet engines prior to takeout [sic], which failed to burn off properly, so some was vented into the aft cabin area.'
Allison Ferre with the Port of Portland, the port district responsible for overseeing Portland International Airport, said 'PDX Airport Fire & Rescue responded to (an) aircraft landing that had reported fumes in the cockpit/cabin at takeoff and returned to PDX.
'The aircraft landed safely and there was no fire or ongoing safety threat, but the PDX fire crew made medical evaluation services available to crew and passengers.'
Alaska Airlines issued a statement: 'Crew members detected a strong odor on board Flight 757 from Portland (PDX) to Las Vegas (LAS) shortly after takeoff.
'As a precaution, the pilots returned to PDX where medical professionals met the aircraft at the gate and evaluated crew members.
'The aircraft was removed from service for inspection, and we are re-accommodating our guests on a new aircraft.
'We apologize to our guests for any inconvenience this may have caused.'