(QHA) -

The United States’ Federal Aviation Administration (FAA) has extended its earlier flight restrictions to include the airspace above Ukraine's city of Dnipropetrovsk and Crimean capital Simferopol.

In an amendment to flight regulations introduced previously, the FAA “expands the area in which flight operations by persons subject to SFAR No. 113 are prohibited, to include all of the Simferopol (UKFV) FIR, as well as the entire Dnipropetrovsk (UKDV) FIR.”

The extended flight ban has been introduced as the FAA said it finds it “necessary to prevent a potential hazard to persons and aircraft engaged in such flight operations.”

In April, the FAA introduced Special Federal Aviation Regulation No. 113, which forbids flights over parts of the Simferopol region, citing “safety and national concerns” due to increased tensions between Ukraine and Russia.

Crimea seceded from Ukraine and joined Russia in March, after a local referendum which was recognized by the Kiev authorities and the international community.