Bella ran straight to their flat, but it was a long distance and it was not night that she could hide in the darkness. She had to take the measures to not get caught because reaching there was important.
Once she reached there, she knocked at the door once, twice, many times. But the door did not open. She could smell the gas reaching to her nose.
She panicked and put some pressure on the door, but as she opened it a strong blast sounded and the whole house started burning. The fire blew out all the doors and windows. It was so strong that even Bella jerked a few steps backward.
She had to hold the wall to stabilize herself. It took her a few seconds to stand up again as she knew it was already too late.