Best Jokes and Riddles

#57

This chapter is dedicated to Neevts for giving me this riddle:)
And the answer to the previous riddle is the letter T is in the middle of water!!

In this chapter there will be only riddle as it is a little big....

Romeo and Juliet are found dead on the floor in a bedroom. When they were discovered there were pieces of glass and some water on the floor.
The only furniture in the room is a shelf and a bed. The house is in a remote location away from everything except for the nearby railway track.
What caused the death of Romeo and Juliet?

Comment your answers.
Answer will be on next chapter.