The man who confessed to shooting 10 people, killing seven, at a small Christian college in Oakland earlier this month has been hospitalized after refusing to eat since his incarceration, according to authorities.

The Alameda County Sheriff's Office announced Monday that One L. Goh had been placed in the infirmary at Santa Rita Jail three days earlier to be treated for health issues that have arisen from starving himself since he was arrested for the shooting spree at Oikos University on April 2.

"Staff Doctors continue to monitor his health and he is evaluated every day on his medical condition," said Sheriff Gregory Ahern in a press release Monday. 

After dropping out of school the previous fall, 43-year-old Goh went on a shooting rampage after the school had refused to reimburse $4,000 to $6,000 in tuition, according to school officials.

Police said he arrived at the school that day with a .45-caliber semiautomatic handgun, which was later found in a nearby waterway, and that he may have been targeting certain staff members.

When Goh learned his intended targets were not at the school, police said, he began opening fire in classrooms. Police said he tried to line up victims then started firing when some cooperated and others did not.

Those killed were Doris Chibuko, 40, of San Leandro: Judith Seymour, 53, of San Jose; Grace EunHea Kim, 23; Lydia Sim, 21, Bhutia Tshering, 38, and Sonam Choedon, 33, and secretary Katleen Ping, 24.

Goh was arrested a few hours after the shooting at a grocery store in Alameda where he reportedly confessed his crimes to an employee there. 

A native of South Korea who had become a U.S. citizen, Goh was charged with seven counts of murder and three counts of attempted murder. He had not yet entered a plea as of Monday.

In a previous jailhouse interview, Goh apologized for the shooting.

"I only remember parts of that day and it is too hard to talk about," Goh told the station, at times weeping.

“He's now in this situation, he feels some shame, and now he's says he's not hungry,” said Sgt. J.D. Nelson, public information officer for the Alameda Co. Sheriff's Office, on Monday.

The sheriff's office cannot force Goh to eat and may have to obtain a court order to insert a feeding tube if his condition worsens.

The sheriff's announcement came the same day that some Oikos University students returned to class for the first time since the shooting.

The school, which was still draped with a memorial banner and littered with flower bouquets, held a single English-as-a-second-language class three weeks after the shooting.

The small school in an industrial area of the city had been busy preparing to resume operations by replacing carpet and removing bloodstains and bullet scars.

Lucas Garcia, who taught Monday's class, was in the building at the time of the shootings. He has been spending time getting in touch with students since the attack and believes it's important to come back to campus and move on.

"They feel very scared and are dealing with a lot of emotions about what happened," Garcia said. "They're dealing with symptoms of a very traumatic experience."

Arriving students declined to talk to reporters.

School dean Jongjin Kim said most students were expected to take classes in the same building where the shootings occurred, with nursing students permitted to attend Unitek College in Fremont.

The university's president planned to speak to the media Tuesday.