Ammon News - The U.S. dollar firmed on Monday as nervy investors sought safety, although the restrained moves suggest markets were waiting for Iran's response to U.S. attacks on its nuclear sites that have exacerbated conflict in the Middle East.

Iran said on Monday that the U.S. attack on its nuclear sites expanded the range of legitimate targets for its armed forces and called U.S. President Donald Trump a "gambler" for joining Israel's military campaign against the Islamic Republic.

The dollar firmed 1% against the yen and was last at 147.450 , at its highest level since May 15.

The euro fared better, just 0.2% lower at $1.14965 and unchanged after Euro area flash PMIs showed the region's economy flatlined for a second month in June.

Slightly improving UK flash PMIs also hit screens but didn't move the dial on sterling , which last fetched $1.34385, just 0.1% lower against the dollar.

Meanwhile, the Australian dollar , often seen as a risk proxy, hit a one-month low and was last 0.52% weaker at $0.64180, while the New Zealand dollar sank 0.68% to $0.5926.

That left the dollar index , which measures the U.S. currency against six other units, 0.15% higher at 99.065. Reuters