Key Asian currencies ended the week mixed against the dollar as the United States announced hefty job loss figures and amid predictions of a US interest rate rise. The Thai baht fell further as foreign investors took fright over domestic concerns. The yen fell back to three-month lows against the US dollar on speculation about rises in US interest rates, which could encourage speculators to borrow the Japanese currency to invest overseas. The yen hit the week's low of 106.26 to the dollar before ending daytime trading at 106.03-05 to the dollar on Friday, down from 105.44-47 to the dollar a week earlier. The US Labor Department announced late Friday the US unemployment rate jumped unexpectedly by a half percentage point to 5.5 percent in May, the steepest increase in more than two decades.