lyndsey brinkley explains what that means. >> reporter: three more victims ended up at the hospital.he alameda county sheriff said the gun crimes are getting more brazen this month. over the weekend three deputies were ambushed and shot at on a tkphráesic violence call. on monday. a tv photograph and recorder were held at gunpoint after they interviewed the khraoef of violence prevention. >> the number of weapons that we're recovering each and every day off the street has increased. it's almost probably up are i would have to guess 40% from the previous year. >> reporter: they include powered assault rifles and semi automatic handguns. >> it could be the individuals that aren't there in the community. it could be a number of gangs that are at war right now with one another. >> one of the main reasons is the availability of street level drugs. and the drugs lead to a lot of profit for the people involved and they fight and kill for that profit. >> reporter: it all led to the alameda county board of supervisors issuing a resolution declaring gun violence a public health crisis which op