time."

One of those killed, Nicholas Cumer, was a week shy of completing his internship at Maple Tree Cancer Alliance, a non-profit patient care center in Dayton.

The center said in a statement it had offered Cumer a full-time job last week. "He loved his patients and served them well, with a loving and caring spirit," the statement said. Two of his colleagues were also shot and expected to make a full recovery.

Lois Oglesby, a nursing student with a newborn child and a young daughter, was also killed, the Atlanta Journal-Constitution reported.

Biehl said Betts' parents were having a tough time. "This is a nightmare for them and I think they are struggling as I think you can understand," he said at the news conference.

Four of those injured in the attackremained in serious condition and one person in critical, medical authorities said.

The shootings in Texas and Ohio happened a week after a teenager killed three people with an assault rifle at a food festival in Northern California before taking his own life.