They were to dock at the International Space Station six hours later, but the booster suffered engine failure minutes after the launch.
Roscosmos said on Thursday that it would suspended all manned flights to the space station pending the investigation, and Krikalyov said on Friday that the orbiting outpost could be switched into an unmanned mode if the investigation takes a while.
Dzhezkazgan is about 450 kilometers (280 miles) northeast of Baikonur, and spacecraft returning from the ISS normally land in that region. Three crew are now aboard the station and were due to return in December.
"The crew landed", Dmitry Rogozin, director of the Russian space agency Roscosmos, said on Twitter. Their Soyuzcapsule is good for about 200 days in orbit.
Popular Mechanics reports that Thursday's launch is the fourth time that a ballistic re-entry has occurred in the Soyuz program. The spacecraft experienced a booster failure just a couple of minutes after launching, resulting in a launch abort. "That means the crew will not be going to the International Space Station today".
Nasa mothballed the space shuttle programme in 2011, and since then has been paying Russian Federation tens of millions of dollars to send astronauts to the ISS.
Dmitry Rogozin, the head of Russian space agency Roscosmos, tweeted shortly after the incident that a commission of inquiry had already begun work on figuring out the cause, by studying telemetry data from the craft.
But the emergency ballistic landing was executed properly, and rescue teams pre-deployed along the Soyuz's flight path went into action quickly. Soviet cosmonauts Vladimir Titov and Gennady Strekalov jettisoned and landed safely near the launch pad after the Soyuz explosion.
Typical crewed launches feature three passengers.
The latest failure yesterday, amid a long string of Russian rocket crashes, was another black eye for the Roscosmos space agency.
"The boys have landed", mission control told the astronauts, who arrived at the space station in June and were scheduled to return December 13.
A U.S. astronaut and a Russian cosmonaut are alive after a failure during a mission to the International Space Station.
With the two astronauts on board now safe, ESA astronaut Alexander Gerst is giving us a new perspective on today's launch.
Glitches found in Russia's Proton and Soyuz rockets in 2016 were traced to manufacturing flaws at the plant in Voronezh.
"We have a lot of things planned through the rest of the fall and the winter, and that's all just being reassessed right now", Sam Scimemi, NASA's director for International Space Station, told Reuters.
Princess Eugenie arrives at Windsor Castle for her wedding day
The group says Eugenie does not carry out royal duties and that weddings are personal, private occasions, not affairs of state. And with the presence of so many royals - and a number of celebrity guests - extra security measures have been put in place.
Online Sports Betting Market Growth
Benefits With the market high, sports betting is an activity that receives a high level of support from online betting companies. More betters are opting to forego the long lines at the cashier's counter and the unavailability of their favorite machines.