The explosion caused the partial collapse of a residential building in the industrial city of Magnitogorsk, leaving hundreds without a home in freezing temperatures on New Year's Eve. At least 20 people are reported missing.

Emergency personnel are seen at the site of collapsed apartment building after a suspected gas blast in Magnitogorsk, Russia December 31, 2018. Minister of Civil Defence, Emergencies and Disaster Relief/Handout via Reuters.
Emergency personnel are seen at the site of collapsed apartment building after a suspected gas blast in Magnitogorsk, Russia December 31, 2018. Minister of Civil Defence, Emergencies and Disaster Relief/Handout via Reuters.
(Minister of Civil Defence, Emergencies and Disaster Relief/Handout via Reuters)
Search crews have pulled more bodies from a huge pile of rubble at a collapsed Russian apartment building, bringing the known death toll to 21. The bodies found on Wednesday in the city of Magnitogorsk included a 3-year-old girl, Russian news agencies cited the emergencies ministry as saying.
An 11-month-old boy who was pulled alive from the wreckage on Tuesday, nearly 36 hours after the building collapsed, was in serious but stable condition in a children's hospital in Moscow. He was flown about 1,400 kilometers to the capital in a plane dispatched by the Health Ministry.
Health Minister Veronika Skvortsova said Wednesday that the boy suffered superficial head wounds but no apparent brain damage.
Authorities said 20 people who lived in the building remain unaccounted for, including five children.

In a separate incident late on Tuesday, three people died on the same street where the building collapsed when a minibus became engulfed in flames, TASS news agency reported citing the local government office.
Video footage purporting to show the incident, posted on social media sites, shows a burning vehicle and some bangs are heard. A police spokesman declined to comment when contacted by phone.
The reason behind the collapse of the apartment block is still being investigated, the Investigative Committee, which probes into major cries, said on its website.
It said no trace of explosives materials had been found so far on the site. The initial reports put a possible gas leak behind the collapse. 'Common tragedy' Located in the mineral-rich southern Ural region, Magnitogorsk, with a population of more than 400,000 people, is home to one of the country's largest steel producers.
The high-rise was built in 1973 and was home to around 1,100 people. Residents were evacuated to a nearby school.
Volunteers offered money, clothing and essentials to the victims, and some said they were ready to provide temporary shelter to those in need.
Regional governor Boris Dubrovsky said authorities planned to buy apartments for people who had lost their homes.
Staff from the local Magnitogorsk Iron and Steel Works (MMK), one of the country's largest steelmakers, took part in the rescue operation.
Billionaire Viktor Rashnikov, who controls the plant, called on city residents to help the victims.
"This is our common tragedy and pain," he said in a statement, adding that MMK would provide financial assistance to those in need.
Investigators opened a criminal probe into the accident, with the FSB security service confirming the blast had been the result of a gas explosion.
Such deadly gas explosions are relatively common in Russia where much of the infrastructure dates back to the Soviet era and safety requirements are often ignored.Source: trtworld.com