MANAMA, Bahrain — A sailor who allegedly shot and killed his ex-girlfriend and her roommate Monday at the U.S. Navy base in Bahrain has been flown to Landstuhl Regional Medical Center in Germany.

He remained in critical condition on Thursday with a self-inflicted gunshot wound to the head.

The Navy has not released his name, but a hospital spokesman in Bahrain confirmed the alleged shooter is Clarence Jackson. He did not provide any information on his rank or age.

The base has changed the day of a memorial service for both Seaman Genesia Mattril Gresham, 19 of Lithonia, Ga., and Anamarie Sannicolas Camacho, 20, of Panama City, Fla., from Sunday to Monday at 2 p.m. at the chapel, base spokeswoman Millie Perera said.

All three sailors were members of the base’s security forces department.

Jackson had been at the Bahrain Defence Force Hospital since the shooting early Monday at Naval Support Activity Bahrain.

The Navy continues to investigate the shootings, but has not filed any charges in the case, said Lt. John Gay, a spokesman for the Bahrain-based U.S. Naval Forces Central Command and 5th Fleet. If Jackson does not survive the severe injury, Gay said the Navy would close the case. If he were to survive but remain hospitalized indefinitely, it would likely present the Navy with a complicated legal dilemma.

Jackson was on duty when the shooting occurred, which would explain why he had the gun. Sailors are prohibited from carrying their own personal firearms on base, and security forces members are not allowed to be armed when they are off the clock.

“They don’t carry when they are off duty,” Gay said. “They go through a required check-in and check-out process.

“Therefore, he was on duty,” he added.

The Navy is waiting until the investigation is complete before releasing any additional details on what happened. But sources who did not want to be named have said the shootings are a result of a tumultuous relationship between Jackson and Gresham.

Lt. Denise Garcia, a 5th Fleet spokeswoman, said that Gresham had a relationship with Jackson, “but the extent of that relationship we don’t know.”

Jackson had made threats against Gresham in the past, had been punished for it and was ordered to stay away from her, base sources have said.

Navy Cmdr. Aaron Jefferson, the chaplain for the base and Navy Region Southwest Asia, said the base was shut down for an hour shortly after the shootings because base officials weren’t sure if they had a shooter on the loose.

It was reopened when officials could confirm that the incident wasn’t the result of a breach in security and appeared to involve only the three sailors, he said Tuesday.

Camacho’s mother, Jovy Paulino, told the Saipan Tribune her daughter joined the Navy last year because she couldn’t afford to go to college. Camacho, who graduated from high school in the Northern Marianas Islands, signed up to get the money for college and eventually get her degree.

Paulino told the newspaper that Camacho “always had big smiles.”

“She was an individual who was filled with so much energy,” she told the paper.

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