Carrier/rack problems of the 2009 Honda CR-V

I parked at open parking lot in gated comm unity on 01/24/18 at approximately 7:00pm . The weather was clear and approximately 30 to 40 degrees. I left in m y vehicle at approximately 9:00 am on 01/25/18. I did not notice anything wrong with my sunroof. When I started accelerating at 30 to 40 miles per hour, I heard some crackling noise that was coming from and flying off. I then noticed glass in the sun roof cover that is pulled over the glass inside the vehicle. When I got to work (3 miles on beltway), I observed that the glass of the sun roof was shattered and had a large hole in the glass. I returned to condo and surveilled parking lot and other parked vehicles and did not see anything that may have fallen onto the sunroof. I did not see any glass at the condo where I first got into vehicle. There does not appear to be any object inside the sunroof under the shattered glass. The vehicle is presently in my work garage, and expected date of replacement per m y consultation with the insurance company will be on Monday, January 29, 2018. I am unaware of any damage to the sunroof prior to the shattering.