Sep 19, 2020:

Yesterday, U.S. Supreme Court Justice Ruth Bader Ginsburg died from complications of metastatic pancreatic cancer at the age of 87.

Over the past two decades, Ginsburg had overcome four bouts of pancreatic, lung, and colon cancer. Recently, cancer had spread to her liver.

Source:

Hauck, Grace. (September 19, 2020). "Ginsburg v. cancer was a 'remarkable fight': RBG battled five bouts of cancer over two decades". USA Today. Retrieved 2020-09-19.

The remaining Supreme Court justices released statements about Ginsburg which you can read here.

As far as a replacement for Ginsburg prior to the upcoming presidential election, Lisa Desjardins from the PBS NewsHour lays out all the considerations in an article entitled "Can Trump replace Ginsburg on the Supreme Court before the election?".

More:

• NYT editorial board remembers Ginsburg: She 'will forever have two legacies' | The Hill