Today, the Soyuz MS-10 spacecraft was to deliver astronaut Tyler Haig and cosmonaut Alexei Ovchinin to the ISS. But at startup there was a problem.
During the launch, a non-standard separation of the booster side accelerators occurred. In particular, problems arose with blocks B, C, D and D. The flight control center was able to reestablish communication with the crew. Now the astronauts have an emergency landing. It is reported that the crew has the strongest overload in 6g.
Also, problems confirmed in NASA:
There's been an issue with the booster from today’s launch. Teams have been in contact with the crew. Updates: https://t.co/mzKW5uV4hS
— NASA (@NASA) October 11, 2018