Cycle tyre and tube burst I pumped my cycle front tyre to 105 psi (700*23c) 5 days back and cycled some 60 km on the same day without any punctures. Afterwards I parked the cycle in my bedroom for the last 5 days (due to security reasons I always park them in my bedroom).

Today in the evening the cycle tyre burst and I don't know for what reason. The burst occurred on the middle of the tyre and since not only the tube but also the tyre burst it couldn't be a slow puncture. The temperature in the room would have hardly reached 30 degree Celsius. I have ridden a total of about 4000 km and the tube-tyre set is from the manufacturer.  

Does anyone know the reason for this and how to prevent this?
Since the actual tire has burst, I think the most likely cause is that over the course of the 4000km you have ridden, the tire has suffered a cut or other damage that you did not previously notice.

While sitting in your room, the pressure of the tube has gradually stretched the damaged area, and then burst.

Inspect the other tire to check for cuts or severe wear.