Grigor Stoichkov, a former senior official from the ruling communist party in Bulgaria at the time, said earlier this year that he learned about the explosion at Chernobyl on May 2nd, a day after the mass Labour Day celebrations in Sofia.
Grigor Stoičkov, bivši visoki zvaničnik vladajuće komunističke partije u Bugarskoj u to vreme, rekao je ranije ove godine da je saznao za eksploziju u Černobilju 2. maja, dan nakon velike proslave Dana rada u Sofiji.