PHOENIX – A longtime top executive with Hacienda HealthCare in Phoenix resigned Monday following a report that a patient in a Hacienda center for people with intellectual disabilities became pregnant and gave birth.

Bill Timmons, Hacienda HealthCare's longtime CEO, terminated his employment from the company immediately, said a statement from the company provided by spokesman David Leibowitz.

"Timmons' resignation was accepted unanimously by the Hacienda Board of Directors," the statement said.

Azfamily.com on Thursday reported that a woman who was left in an incapacitated state after a near-drowning more than 10 years ago became pregnant while she was a patient at Hacienda HealthCare in south Phoenix.

The Arizona Department of Health Services on Friday confirmed that the patient who gave birth was a resident at Hacienda de Los Angeles. State licensing records describe the facility as a 60-bed intermediate care facility for people with intellectual disabilities.

In the statement Leibowitz provided, Hacienda HealthCare board member Gary Orman said the facility will accept "nothing less than a full accounting of this absolutely horrifying situation, an unprecedented case that has devastated everyone involved, from the victim and her family to Hacienda staff at every level of our organization."

Orman continued: "I want to assure our patients, their loved ones, our community partners, the agencies we do business with, Governor (Doug) Ducey and the residents of Arizona, we will continue to cooperate with Phoenix Police and the investigating agencies at all levels in every way possible.

"And we will do everything in our power to ensure the safety of every single one of our patients and our employees."

More:Officials investigate apparent sex abuse after patient at facility for people with disabilities gives birth

Timmons was the longtime chief executive officer of Hacienda HealthCare, and on Jan. 1 took the role of president, Leibowitz said. He'd been in that job just days when he resigned.

State health department officials said that after the report, the facility is required to heighten security to ensure its patients' safety.

That heightened security includes increased staff presence during patient interactions, increased monitoring of patient care areas, and increased security measures with respect to visitors to the facility, state health officials said.