Lift-off was at 2:01 am local time (0501 GMT) for the fourth commercial flight of the Ariane 6 launch system since the expendable rockets came into service last year.

The rocket was carrying two more satellites of the European Union's Galileo programme, a global navigation satellite system that aims to make the bloc less dependent on the US's Global Positioning System (GPS).

The two satellites were set to be placed in orbit nearly four hours after lift-off.

They will bring to 34 the number of Galileo satellites in orbit and "will improve the robustness of the Galileo system by adding spares to the constellation to guarantee the system can provide 24/7 navigation to billions of users. The satellites will join the constellation in medium Earth orbit 23, 222 km (14,429 miles)above Earth's surface," according to the European Space Agency (ESA) which oversees the programme.

Previous Galileo satellites were primarily launched by Ariane 5 and Russian Soyuz rockets from Kourou.

After Russia's invasion of Ukraine, Europe halted space cooperation with Moscow.

Before the Ariane 6 rocket entered into service in July 2024, the EU contracted with Elon Musk's SpaceX to launch two Galileo satellites aboard Falcon 9 rockets in September 2024 from the Kennedy Space Center in Florida.