The crash seems to have been caused by “unfavorable weather conditions“, but authorities are every option into consideration.

A U.S. Blackhawk helicopter, carrying four passengers, all members of the U.S. army, crashed yesterday on South west Afghanistan, according to the U.S. Defense Department. The crash seems to have been caused by unfavorable weather conditions.

“The area of the crash was secured” ISAF says, adding that an investigation into the causes of the accident will be started.Approximately 20,000 US Marine Corps marines were deployed in the South West region of Afghanistan.

Although NATO helicopter crashes are frequent in Afghanistan, it rarely happened for them to be taken down by the Taliban.

On Match 16, 12 Turkish soldiers and two civilians died in helicopter crash, in the Kabul area. Six U.S. soldiers were killed in January 19 after a CH-53 Sea Stallion helicopter crashed in the Musa Qala area.

However the most serious crash happened on August 5, 2011, when a Chinook U.S. helicopter was taken down near Kabul by an RPG launched by the Taliban. 8 Afghanistan civilians and 30 Americans, including 22 Navy Seals were killed. The Navy Seals that were killed were part of the SEALs unit responsible with killing Osama Bin Laden.