Heres what we know. A hazmat crew is on the scene. One witness tells us it sounded like a car crash. We heard a big explosion and shook the house and we thought that it was a car that crashed into the house or another car or something, and we came outside and somebody came running out of the house yelling, its bad, its bad. Call 91 1. Okay. An explosion, no fire, but this is in union city. Two people were rushed to nearby hospitals. One of them to the local burn unit. No word on what caused this explosion. We are gathering more information. Well update you later in this newscast or on our twitter feed. Our other top story, a cold case murder in hayward has a formerom atttion can breathe new life into the case. A 44yearold man was walking home from the store when he was shot. No witnesses, no leads. His family is still grieving after 14 years. Nbc bay areas cheryl hurd joins us in san leandro with the details. Cheryl. Reporter well, the victim is jason steklaczek. I talked with his fath