According to Magdalena Alvarez, at least _____ survivors died hours after the accident.

The death toll of the plane crash on Wednesday at Madrid’s international airport has reached 153. With 19 injuries, many of the survivors died in hospitals. At least six of the 26 survivors died hours after the accident due to grave contusions and burns that they suffered. Development Minister Magdalena Alvarez said. He said there were 172 passengers and crew members on board the Spanair MD-82, which burst into flames during the take-off on a flight to Las Palmas in the Canary Islands.
    The crash took place at the International Airport of Barajas, Madrid at 2:45 pm local time when the MD-82 jet shot off the runway at Terminal Four. Airport authorities said engine fire may have caused the accident. Witnesses saw columns of smoke rising from the aircraft whose left engine was said to be on fire.