SPOKANE, Wash. -

A series of six pharmacy robberies in the last nine days are keeping Spokane police busy. 

Right now police have at least one suspect they believe is connected to three of those robberies and say they will continue to focus on her while following up on the others.

Each of the pharmacy robberies focused on getting prescription pills. The most recent was Sunday night at a north Spokane Shopko.

"Right at the moment we've tracked a lot of the time and the dates of these robberies to try to focus our emphasis on these," said Spokane Police Captain Brad Arleth.

The robberies started on December 4 when a female suspect hit an Albertson's and then a Safeway. The very next day that suspect hit the Fred Meyer on South Thor.

"It very well could be that there was a supply of pills illegally that was coming in from out of the area that's somehow been interrupted so people have resorted to obtaining their own," Arleth said.

Police continue to track the data to narrow down future targets and have assigned another detective to these cases but say as of yet an arrest is still a ways off.

"Certainly we are going to treat it as if it would continue until we can put a stop to it," Arleth said.

That also includes looking to other areas for similar crimes.

"We'll even look as far as the Tri-Cities or over into Idaho and Coeur d'Alene, Kootenai County, to see if there are some common themes," Arleth said.

In some of the robberies the crooks brandished a weapon; other times they've threatened to jump the counter and take the pill themselves. Either way these types of robberies are considered a violent crime and are treated as felonies.

Police say it might be too early to determine if these crooks are stealing the pills for personal use or for distribution but that is something they'll be looking into.

Anyone with information on any of the recent string of pharmacy robberies is asked to call Crime Stoppers at 1-800-222-TIPS.