A senior Indian railway official said Friday that authorities are investigating whether some migrant workers died of starvation or heat sickness this week while traveling on special trains to their home villages in blazing heat after losing their jobs in cities because of the coronavirus lockdown.

Railway Board Chairman Vinod Kumar Yadav said more than 5 million migrant workers and their families were transported this month from cities and towns to their home villages on 3,840 trains. He said 80% returned to two of India’s 28 states, eastern Bihar and northern Uttar Pradesh.

Indian media reported at least a dozen deaths in the past week on the trains, including a 35-year-old woman who was found in Muzaffarpur in Bihar state. A video of her body lying in the train station with her toddler playing nearby was widely shared on social media.

FILE - In this Monday, May 25, 2020, file photo, migrant workers wait to board buses for their onward journey by train to their home states, in Mumbai, India. The head of India's massive railway system said Friday that authorities are investigating whether some migrant workers died of starvation or sickness this week while traveling on special trains to their home villages in blazing heat after losing their jobs in cities because of the coronavirus lockdown. Railway Board Chairman Vinod Kumar Yadav said more than 5 million migrant workers and their families this month from cities and towns to their home villages on 3,840 trains. (AP PhotoRajanish Kakade, File)

FILE - In this Monday, May 25, 2020, file photo, migrant workers wait to board buses for their onward journey by train to their home states, in Mumbai, India. The head of India's massive railway system said Friday that authorities are investigating whether some migrant workers died of starvation or sickness this week while traveling on special trains to their home villages in blazing heat after losing their jobs in cities because of the coronavirus lockdown. Railway Board Chairman Vinod Kumar Yadav said more than 5 million migrant workers and their families this month from cities and towns to their home villages on 3,840 trains. (AP PhotoRajanish Kakade, File)

Authorities found two bodies when a train arrived this week in Varanasi in Uttar Pradesh state.

Yadav denied reports of food and water shortages on the trains. He declined to specify how many people had died, but said health authorities are investigating the causes. Television reports have shown desperate migrants looting food trolleys at railroad stations and in trains.

Yadav said railroad authorities arranged for doctors to help 30 women deliver babies during their journeys.

FILE- In this Saturday, May 23, 2020, file photo, migrant workers line up to board trains to their home states as others sleep at a railway station in Hyderabad, India. The head of India's massive railway system said Friday, May 29, that authorities are investigating whether some migrant workers died of starvation or sickness this week while traveling on special trains to their home villages in blazing heat after losing their jobs in cities because of the coronavirus lockdown. Railway Board Chairman Vinod Kumar Yadav said more than 5 million migrant workers and their families this month from cities and towns to their home villages on 3,840 trains. (AP PhotoMahesh Kumar A., File)

FILE- In this Saturday, May 23, 2020, file photo, migrant workers line up to board trains to their home states as others sleep at a railway station in Hyderabad, India. The head of India's massive railway system said Friday, May 29, that authorities are investigating whether some migrant workers died of starvation or sickness this week while traveling on special trains to their home villages in blazing heat after losing their jobs in cities because of the coronavirus lockdown. Railway Board Chairman Vinod Kumar Yadav said more than 5 million migrant workers and their families this month from cities and towns to their home villages on 3,840 trains. (AP PhotoMahesh Kumar A., File)

A nationwide coronavirus lockdown imposed by the government on March 25 caused many impoverished migrant workers in cities to lose their jobs. Many made grueling and dangerous trips back to their hometowns, with most public transport including trains halted under the lockdown. The government began arranging special trains on May 1 to take migrants home.

FILE - In this Saturday, May 23, 2020, file photo, migrant workers look out a train window before moving to their home states, at a railway station in Hyderabad, India. The head of India's massive railway system said Friday, May 29, that authorities are investigating whether some migrant workers died of starvation or sickness this week while traveling on special trains to their home villages in blazing heat after losing their jobs in cities because of the coronavirus lockdown. Railway Board Chairman Vinod Kumar Yadav said more than 5 million migrant workers and their families this month from cities and towns to their home villages on 3,840 trains. (AP PhotoMahesh Kumar A., File)

FILE - In this Saturday, May 23, 2020, file photo, migrant workers look out a train window before moving to their home states, at a railway station in Hyderabad, India. The head of India's massive railway system said Friday, May 29, that authorities are investigating whether some migrant workers died of starvation or sickness this week while traveling on special trains to their home villages in blazing heat after losing their jobs in cities because of the coronavirus lockdown. Railway Board Chairman Vinod Kumar Yadav said more than 5 million migrant workers and their families this month from cities and towns to their home villages on 3,840 trains. (AP PhotoMahesh Kumar A., File)

FILE - In this Thursday, May 21, 2020, file photo, a migrant worker's family waits in a queue to get their names registered to board a train to their home state, during a nationwide lockdown to curb the spread of new coronavirus in New Delhi, India. The head of India's massive railway system said Friday, May 29, that authorities are investigating whether some migrant workers died of starvation or sickness this week while traveling on special trains to their home villages in blazing heat after losing their jobs in cities because of the coronavirus lockdown. Railway Board Chairman Vinod Kumar Yadav said more than 5 million migrant workers and their families this month from cities and towns to their home villages on 3,840 trains. (AP PhotoManish Swarup, File)

FILE - In this Thursday, May 21, 2020, file photo, a migrant worker's family waits in a queue to get their names registered to board a train to their home state, during a nationwide lockdown to curb the spread of new coronavirus in New Delhi, India. The head of India's massive railway system said Friday, May 29, that authorities are investigating whether some migrant workers died of starvation or sickness this week while traveling on special trains to their home villages in blazing heat after losing their jobs in cities because of the coronavirus lockdown. Railway Board Chairman Vinod Kumar Yadav said more than 5 million migrant workers and their families this month from cities and towns to their home villages on 3,840 trains. (AP PhotoManish Swarup, File)