A US Air Force F-16 has crashed outside of Las Vegas in the third aircraft crash in two days.
The status of the F-16's crew is unknown and emergency responders are at the scene.
On Tuesday, a Marine Corps helicopter crashed in California and a Marine Corps AV-8B Harrier jet crashed in east Africa.
A US Air Force F-16 assigned to Nellis Air Force Base in Nevada has crashed outside of Las Vegas in the third aircraft crash in two days.
The status of the F-16's crew is unknown and emergency responders are at the scene, the Air Force confirmed in a statement.
"As soon as additional details become available, they will be provided," an Air Force statement said. "The accident is under investigation."
The F-16 crashed around 10:30 a.m. during routine training.
A look at F-16 fighter jets
A look at F-16 fighter jets
A US Air Force F-16C Fighting Falcon performs its flight routine during the Australian International Airshow in Melbourne on March 5, 2017.
The annual event sees 180,000 visitors over the 3-day public event held at the Avalon Airfield some 80kms south-west of Melbourne. / AFP PHOTO / MAL FAIRCLOUGH (Photo credit should read MAL FAIRCLOUGH/AFP/Getty Images)
OHAKEA, NEW ZEALAND - FEBRUARY 25: A United States Air Force F-16 puts on a flying display at the 2017 Air Tattoo at RNZAF Base Ohakea on February 25, 2017 in Ohakea, New Zealand. The Royal New Zealand Air Force is celebrating its 80th Anniversary. (Photo by Kerry Marshall/Getty Images)
US Air Force F-16 Fighting Falcon performs during 'Air Power Day' preview at US Osan Air Base in Pyeongtaek on September 23, 2016.
An American strategic bomber arrived in South Korea on September 21 in a show of force the US said was aimed at reminding Pyongyang of its powerful military assets in the region. The event will be held for two days from on September 24. / AFP / JUNG YEON-JE (Photo credit should read JUNG YEON-JE/AFP/Getty Images)
Lockheed Martin's F16, the 4th generation advanced fighter of the US Air Force, taxis on the tarmac on the inaugural day of the 11th edition of 'Aero India', a biennial air show and aviation exhibition, in Bangalore on February 14, 2017. / AFP / MANJUNATH KIRAN (Photo credit should read MANJUNATH KIRAN/AFP/Getty Images)
This photograph taken on November 12, 2016 shows a Singapore's RSAF's F-16 landing on a public road in Lim Chu Kang area during a media preview in Singapore.
A public road was converted into a runway as part of the Republic of Singapore Air Force (RSAF) exercise Torrent for an alternate runway exercise to increase its aircraft take-off and landing capabilities. / AFP / ROSLAN RAHMAN (Photo credit should read ROSLAN RAHMAN/AFP/Getty Images)
A picture taken on June 28, 2016 shows an Israeli Air Force F-16 fighter jet preparing to take off at the Ramat David Air Force Base located in the Jezreel Valley, southeast of the Israeli port city of Haifa. / AFP / JACK GUEZ (Photo credit should read JACK GUEZ/AFP/Getty Images)
Fighter pilots stand near F-16 Fighting Falcon during the opening ceremony of NATOs large scale exercise Trident Juncture 2015 at the Italian Air Force Base in Trapani, Sicily. AFP PHOTO / MARCELLO PATERNOSTRO (Photo credit should read MARCELLO PATERNOSTRO/AFP/Getty Images)
EGYPT - 2015/07/31: The Egyptian Air Force partakes in an airshow above Cairo as the Egyptian air force celebrates eight new F-16 jets delivered to Egypt by the United States. (Photo by Ahmed Abdel Fattah/Pacific Press/LightRocket via Getty Images)
NEW YORK, NY - MAY 22: The US Air Force Thunderbirds consisting of six F-16 aircraft perform a flyover over New York Harbor on May 22, 2015 in New York City. The flyover is part of the 2015 NYC Fleet Week festivities. (Photo by Michael Heiman/Getty Images)
AVALON, AUSTRALIA - FEBRUARY 27: F-16C Fighting Falcons from the Republic of Singapore Air Force fly past each other as they perform at The Australian International Airshow on February 27, 2015 in Avalon, Australia. The Australian International Airshow 2015 pays tribute to Anzac and the heroes of military aviation. Also featured is the latest military heavy metal from Australia and overseas including super sonic jet fighters and attack helicopters. (Photo by Scott Barbour/Getty Images)
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On Tuesday afternoon, a Marine Corps CH-53E Super Stallion helicopter crashed around El Centro, California, during a routine training mission. Four crew members aboard the helicopter were killed.
Additionally, a Marine Corps AV-8B Harrier jet crashed during a training exercise in Djibouti, east Africa on Tuesday. The pilot ejected and was being treated at a hospital.
Congress and the military have come under scrutiny amid the spate of aircraft crashes. Military leaders have long argued for an increased budget to combat a "readiness crisis" as foreign adversaries have gained momentum in other areas of the world.
Marine Corps Lt. Gen. Steven Rudder, the Corps' deputy commandant for aviation, said in November that although pilot and aircraft readiness was steadily improving, the Corps was still dealing with the effects of "the minimum requirement for tactical proficiency."
"Newly winged aviators ... [are] the foundation of the future of aviation," a prepared statement from Rudder said, according to Military.com. "When I compare these 2017 'graduates' of their first fleet tour to the 2007 'class,' those pilots today have averaged 20% less flight hours over their three-year tour than the same group in 2007."