were plumes of smoke for miles in east oakland. more than 75 firefighters responded throughout the night. >> the fire was very established, putting up a significant amount of heat due to the materials inside of this building being a lumber supply company, the building behind us was used to store materials. it also was their main showroom for doors and windows as well. >> rail service was stopped temporarily and some roads were blocked after the blaze broke out. and right now our photographer says high street is still closed. so if you travel in that area, keep that in mind. it's still unclear how the fire started and thankfully no injuries were reported live in the studio. gloria rodriguez abc seven news thanks, gloria and the east bay port costa's annual community wide flea market was interrupted by a bomb scare on saturday. >> firefighters helped a resident pry open an old box handed down to him from a family member years back. an alarming find was inside a live hand grenade and a...