Moscow ­ Four partygoers were crushed to death at a disco in Russia, police said on Sunday, after the disco's owner allowed a crowd to surge in during a half hour free admission period.

The victims were three students and a 30-year old man, according to the Interfax news agency.

The tragedy happened in the Ural mountain town of Pervouralsk, in Yekaterinburg, on Saturday night. (dpa)