Goldman Sachs said it will limit its private placement of shares of social networking site Facebook to investors outside the United States, citing “intense media coverage,” according to the investment bank. Goldman expects to raise $1.5 billion for Facebook, the wildly popular site used as a message board and for online social networking. The chance to buy a slice of Facebook ahead of any future public listing attracted widespread commentary and news coverage, which potentially could bring it under regulatory scrutiny. “In light of this intense media coverage, Goldman Sachs has decided to proceed only with the offer to investors outside the U.S.,” the company stated.