The Pakistan Taliban said it killed 10 foreign mountain climbers, including one American, in retaliation for a U.S. drone strike that killed a deputy leader last month.
About 15 terrorists disguised as policeman attacked the base camp at Nanja Parbat, the ninth highest mountain the world.
Some mountain climbers managed to escape, but the rest were shot dead.
The tourist area of Pakistan is far from the Taliban's strongholds near the Afghan border and usually does not suffer terror attacks.
A spokesman for the terror group said they chose to attack foreign visitors to influence world powers to pressure the United States to stop drone attacks.