All of the Washington Chipotle branches voluntarily closed their doors last week as health officials investigate recent E. coli cases, including six in King County, linked to the Mexican restaurant.

As of Tuesday afternoon, the number of people infected has risen from 19 to 25 in Washington, according to the Washington State Department of Health.

Additionally, there are 12 more cases linked to the restaurant in Oregon, according to the Oregon Health Authority.

Several are hospitalized; no deaths have been reported.

Though only eight restaurants in Washington and Oregon are linked to the outbreak, Chipotle Communications Director Chris Arnold said Tuesday, the company closed all Washington locations and all restaurants in the great Portland, Oregon, area.

“We offer our deepest sympathies to those who have been affected by this situation,” Arnold said. “Out of an abundance of caution, we have closed 43 restaurants in those areas.”

Of the six ill in King County, at least two are in the hospital, Hilary Karasz of Public Health — Seattle & King County said Saturday.

At least two of the King County residents who have fallen ill are teenagers and at least two are in their 20s.

Karasz did not know where in King County the residents live.

In all, there are nine Washington citizens and three from Oregon in the hospital.

The King County residents sickened with E. coli ate at the Chipotle between Oct. 19-23, she said.

Out of the 25 reported in Washington, 23 reported eating at Chipotle in the last couple of weeks, leading officials to believe the outbreak is connected to the food chain.

“This is the early stages of the investigation,” Karasz said. “If you ate at Chipotle in the last couple weeks and you feel ill you should call us or your doctor.”

They type of E. coli strain in this outbreak has not been confirmed, but it is a Shiga toxin-producing strain similar to E. coli O157:H7, according to Karasz. Symptoms include bloody diarrhea, abdominal cramps, fever and vomiting.

“It can sometimes result in severe, life-threatening illness and death,” Karasz wrote in a Public Health statement. “In general, anyone with bloody diarrhea should see a healthcare provider.”

Local and state health officials in Washington and Oregon are working with the U.S. Food and Drug Administration, Washington State Department of Agriculture and the U.S. Centers for Disease Control and Prevention to investigate the outbreak.

For more information and daily updates, visit www.doh.wa.gov/Newsroom.

Or call Public Health — Seattle & KIng County at 206-296-4774.