Bicycle detail

I accidentally left my bike unlocked in our backyard overnight. I believe the gate to the backyard was also left unlocked. Our apartment has an alleyway next to it that leads back to our backyard, which is blocked off by a gate. Somebody was able to enter through our back gate into the backyard, take the bike (along with the lights attached to it) and get away. I do not know exactly what time it happened, but sometime between when I left the bike unlocked on the 9th at 7pm and when I went outside on the 10th at 9am to see that it was gone.