A deadly week for Afghanistan continues with the crash of Black Hawk helicopter Thursday in the southern region of the NATO-occupied country resulting in the death of four Afghans and seven U.S. soldiers.

"The crash resulted in the deaths of four International Security Assistance Force service members, three United States Forces-Afghanistan service members, three members of the Afghan National Security Forces, and one Afghan civilian interpreter," International Security Assistance Force (ISAF) said in a statement.

Agence France-Presse points out that the "ISAF statement did not use its normal phrasing for a simple helicopter crash, which includes the line that no enemy activity was reported in the area."

The Taliban claimed responsibility for the attack.

"We hit the ISAF helicopter with a rocket-propelled grenade," said Qari Yousef Ahmadi, Taliban spokesman for the southern region.

Reuters points out that it's been a deadly week in Afghanistan that "included multiple suicide bombings which killed 63 civilians in one day, most of them shoppers in markets."