MARTIN COUNTY, Fla. - Signs on the interstate are nothing new.
But the signs posted in the northbound lanes of I-95 Wednesday in Martin County were.
They read: K9 drug dog ahead. All drugs seized. Prepare to stop.
Four deputies lined the Bridge Road overpass looking for a reason to stop drivers for a traffic infraction so they could ultimately check them for drugs.
Authorities said 4 arrests for marijuana and steroids had been made by early afternoon.
But Martin County Sheriff William Snyder said the real target was heroin. He said heroin use has been on the rise in Martin County. "Sending this message is a lot like fishing, we know there's fish here, we won't always catch them, but we'll keep at it and eventually we will connect."
The sheriff said his department wanted to stop drugs coming up from Miami-Dade, Broward and Palm Beach Counties. According to the sheriff, "one person using drugs in Martin county is too many."
The patrols lasted through Wednesday evening.
The wptv.com web team contributed to this report