The US dollar strengthened against major currencies after the Labor Department reported that initial jobless claims fell by 22,000 to 187,000 last week, the lowest level since September 1969 and well below analysts' forecast of 215,000. The dollar index rose 0.31 percent to 101.435, while the dollar gained 0.28 percent against the euro to 1.138 and firmed 0.37 percent to 163.73 yen. The dollar also drew support from safe-haven buying amid concerns over the situation in the Middle East, after President Donald Trump said he is seriously considering resuming major military operations against Iran.