The death toll in the South Korea disaster is rising, with 187 people confirmed dead and 115 still missing.
As to what caused the ship to sink, there are damning new questions about the ferry's builder and why two of its ships built around the same time were both met with the same fate - they capsized.
CNN's Kyung Lah is OutFront in Jindo, South Korea with what she learned about these ships.
There questions about the role recent structural changes may have played in the South Korean ferry disaster.
Renovations made last year expanded the top floor of the ferry in order to make room for 117 more passengers.
Now, investigators want to know if the modifications, which added 180 tons to the weight of the ship, made the ferry more likely to capsize.
CNN's Chad Myers reports on what the cargo and renovations could have done to the ship.
The death toll from the capsized ferry rising tonight to 181 people - and 121 are still missing.
So why did the ship suddenly take on water?
Investigators are now taking a closer look at renovations made to the ship last year.
A South Korean politician claims the ship's owner expanded the top floor of the ferry, making room for an additional 117 passengers.
The extra weight may have shifted the center of gravity.
First distress call on S. Korean ferry from passenger, not crew, coast guard says
Officials are also looking at whether cargo was properly story in the hold.
Kyung Lah reports on the growing frustration as the search and rescue continues.
Jindo, South Korea (CNN) - A South Korean lawmaker said Thursday that renovations last year expanded the top floor of the Sewol, the ferry that sank last week, to make room for 117 more passengers.
Investigators want to know if the modifications made the ferry more likely to capsize.
Kim Yong-rok, an opposition lawmaker who represents Jindo, an island near where the ship sank, told CNN that the modifications raised the ferry's center of gravity.
Kim said the work on the ferry took place in 2013, after the Sewol was purchased from a Japanese company. The ferry's passenger capacity was expanded from 804 passengers to 921 passengers, he said.
Questions are growing about the owner of the sunken South Korea ferry. South Korean authorities searched the offices of the owner of the on Wednesday, prosecutors confirmed to CNN, broadening a criminal investigation that has already ensnared 11 members of the ill-fated ship's crew.
The owner is a mysterious millionaire, who is rarely seen in public.
Recently his company had fallen on hard times.
CNN's Kyung Lah has the story.