That's terrible news. St. Lucia has, according to some online sources, a 'moderate' crime rate. In 2010 and 2011 they had an average of 49 murders each year, and with a population of 176,000 in an island environment that is fairly significant.
Wasn't there a similar robbery of Celebrity passengers a few years ago? (St. Thomas, I thin, but I don't want to cast aspersions.) if I remember correctly, Celebrity reimbursed the passenger losses.
A Bad Day At Sea [with power] Always Beats A Good Day At Work
Carnival: Glory 2004, Destiny 2008, Splendor 2009, Freedom 2011, Valor 2012, Dream 2013
Celebrity: Summit 2011
Princess: Ruby 2010, 2014, Caribbean 2013, Coral 2014, Regal 2014
Star Clippers: Royal Clipper 2015