Max Shacknai, the 6-year-old-son of Medicis Pharmaceuticals CEO Jonah Shacknai, died after sustaining injuries from last week's accident. It was the second death in the mansion after a woman's naked body was found hanging from a balcony two days before.

Last week, Shacknai sustained critical injuries after falling down the stairs in Shacknai's Coronado mansion. Two days after Jonah Shacknai's girlfriend Rebecca Nalepa was found dead in a bizarre fashion at the same mansion.

Shacknai's brother, who was staying at the mansion, found her hanging from a second-storey balcony. Nalepa, 32, was nude and her hands and feet were bound with electric wires.

Shacknai was reportedly not at home at the time of the death of his girl friend Rebeccca Nalepa, who is of Burmese origin. She had been dating Shacknai for the last two years, and little Max had been under her care when he had the fatal fall.

Jonah Shacknai, the boy's father, announced the boy's passing away in a statement.

With great sadness, Dina and I convey the tragic passing of our beloved son, Max. Despite heroic efforts on the part of paramedics and hospital staff, he was unable to recover from the injuries suffered early last week. His loving, kind and vibrant spirit will be forever in our hearts and those whom he touched every day, Shacknai said in a joint statement with ex-wife and Max's mother Dina Romano.

However, authorities said there has been no connection made between the two deaths. But, they haven't determined whether Nalepa's death was a homicide or not.

It is believed that Jonah Shacknai was not home during his son's injury nor when Rebecca's body was found.

Medicis issued a brief statement on the incident without giving details.

The Medicis family is deeply saddened to learn of a tragic incident at a California property owned by Jonah Shacknai, the company said. Our thoughts are with Jonah and his family and ask that the family's privacy be respected during this difficult period.

Scottsdale, Arizona-based Medicis Pharmaceutical (NYSE:MRX) is a specialty pharmaceutical company in the United States focusing primarily on the treatment of dermatological and aesthetic conditions.

The company's products include the brands Dysport, Perlane, Restylan, Dynacin and Loprox. Medicis generated sales of $700 million in 2010.

Shares of the company fell about 3 percent to trade at $37.98 on the NYSE.