Death toll rises to four in apparent gas explosion at Siberian mall

BIISK, Russia, Feb. 24 (UPI) -- Rescuers recovered a fourth body at a Siberian shopping mall struck by an explosion that may have been caused by a gas leak, officials said Monday.

The victims of the Sunday blast, all women, were between the ages of 20 and 40, RIA Novosti reported.

Officials said a buildup of gas had been discovered in the ground at the mall near the center of the city of Biist and an investigation was opened into possible negligence.