sanfrancisco police lieutenant troy lang -- troy dangerfield is live on the phone. what is the situation there? >> good morning, tori. this morning at about 7:15. there was a call about some grenades by the residents here in the 600 block of po ter row. we're underring that the owner of the -- we're understanding that the owner of the building was 29 and passed away and they were cleaning -- 92 and passed away and they were cleaning out, the family was and they found these grenades. and they called the police immediately. so as a precaution, the bomb squad is out there. they are also checking the house for -- for any other things that might be around and left as well. >> lieutenant, mike mibach here. can you tell us -- you said five to six grenades. when you get the grenades secure, where do you take them? >> i'm not sure where they take them and i'm not for sure where they -- whether they are real or not. they are gonna -- gonna -- gonna dispose of them and they are cordenning often the two- block area of potrero. there's no one in the building. >> down how long th

. >> reporter: that's what troy dangerfield just says, just visiting san francisco, met the man in union square and hung out with him for an hour. dangerfield says the man asked her to buy him a soda, possibly to get her to take out her wallet. when she refused, he grabbed it and ran off. today the cell phones give them something that didn't used to be able to do. >> you never know what might happen. >> reporter: they are grateful to have this tape and encourage other people to do the same thing with their little cell phone cameras if that's at all possible. they are hoping that somebody will take a look at this, recognize this man's mannerisms or his clothing, anything that can help them keep this man from getting away with it. live in san francisco. tracy grant, nbc bay area news. >> how violent a simple robbery can be. thank you. >>> oakland police are investigating a sexual assault that happened a block away from the lake merrittbert station. it's the third attack on a woman in that area in the last three months. the latest attack happened on jackson around 10:00 last night. the vict