Oil prices rose 1 percent on Tuesday, as fighting in Libya and falling Venezuelan and Iranian exports raised concerns over tightening global supply, but uncertainty surrounding an OPEC-led production cut limited gains. Brent crude futures rose 54 cents, or 0.76 percent, to settle at $71.72 a barrel. U.S. West Texas Intermediate (WTI) crude futures gained 65 cents, or 1 percent, to settle at $64.05 a barrel. In Libya, fighting between Khalifa Haftar’s Libyan National Army and the internationally recognized government has raised the prospect of lower supplies from the OPEC member. U.S. sanctions on two other members, Iran and Venezuela, are already cutting shipments. Iran’s crude oil exports have dropped in April to their lowest daily level this year, tanker data showed and industry sources said. “Global […]