New York- from www.cbsnews.com – “Sexy Cora,” the German porn star who died last Thursday after undergoing a sixth breast enlargement operation, had her previous five surgeries done at a private clinic in Poland which refused to admit her for a sixth time, according to a report.

The 23-year-old fell into a coma on Jan. 11 during surgery at a clinic in Hamburg, Germany, a spokesperson for the state prosecutor told CNN. Two doctors have since been charged with negligent manslaughter.

According to Sky News, Berger was having “28 oz. of silicon injected into each breast” and was going from a size 34F to a 34G.

BBC News reports that she may had suffered two heart attacks during the procedure.

According to the German newspaper Bild, she was put into an artificial coma following the procedure. CNN reports she died on Thursday.

Bild reports that Cora appeared in over 100 pornographic films and the German edition of the reality TV show Big Brother.

According to a statement from the clinic obtained by CNN, the doctors in question are cooperating with police.