WASHINGTON — The Treasury Department has received another $1.8 billion in net proceeds from the sale of additional stock in General Motors.

Treasury said the revenue received Thursday brought the total amount the government has earned from an initial public offering of General Motors stock to $13.5 billion.

Treasury had said last week it expected to earn another $1.8 billion if the bankers who handled the IPO exercised their full options to purchase an additional 53.8 million shares of GM common stock.

The government put $49.5 billion into GM as part of its bailout of the giant automaker.

STOCKHOLM — WikiLeaks was forced today to switch over to a Swiss domain name, wikileaks.ch, after a new round of hacker attacks on its system prompted its American domain name provider to withdraw service.WikiLeaks' U.S. domain name system provider, EveryDNS, withdrew service to the wikileaks.org name late Thursday, saying it took the action because the new hacker attacks threatened the rest of its network.“Wikileaks.org has become the target of multiple distributed denial of service attacks. These attacks have, and future attacks would, threaten the stability of the EveryDNS.net infrastructure,” EveryDNS said.