(Reuters) - Hackers going by the name Shadow Brokers said on Monday they will auction stolen surveillance tools they say were used by a cyber group linked to the U.S. National Security Agency.<div><a href="http://feeds.reuters.com/~ff/reuters/technologyNews?a=MZcT5zvXt20:P6-zM8WbuDY:yIl2AUoC8zA"><img src="http://feeds.feedburner.com/~ff/reuters/technologyNews?d=yIl2AUoC8zA" border="0" /></a> <a href="http://feeds.reuters.com/~ff/reuters/technologyNews?a=MZcT5zvXt20:P6-zM8WbuDY:V_sGLiPBpWU"><img src="http://feeds.feedburner.com/~ff/reuters/technologyNews?i=MZcT5zvXt20:P6-zM8WbuDY:V_sGLiPBpWU" border="0" /></a> <a href="http://feeds.reuters.com/~ff/reuters/technologyNews?a=MZcT5zvXt20:P6-zM8WbuDY:-BTjWOF_DHI"><img src="http://feeds.feedburner.com/~ff/reuters/technologyNews?i=MZcT5zvXt20:P6-zM8WbuDY:-BTjWOF_DHI" border="0" /></a></div><img src="http://feeds.feedburner.com/~r/reuters/technologyNews/~4/MZcT5zvXt20" height="1" width="1" alt="" />