One of three inmates who escaped from a maximum-security jail in Southern California a week ago has turned himself in to authorities.

California officials announced Friday that 43-year-old Bac Duong was taken into custody after surrendering to law enforcement shortly before noon, said Orange County Sheriff's spokeswoman Sandra Hutchens at a news conference, according to Reuters. The other two suspects, 37-year-old Hossein Nayeri and 20-year-old Jonathan Tieu, remained at large as of Friday afternoon.

The men escaped from the Orange County Central Men's Jail in Santa Ana last Friday by cutting through half-inch steel bars and used plumbing tunnels to access an unsecured roof, reported The Chicago Tribune. They then used a makeshift rope to rappel from the roof to the ground.

In addition, Jeff Hallock, a Lieutenant at the Orange County Sheriff's Department, announced the arrest of a community college instructor, who began teaching at the jail in July. The instructor allegedly assisted in the escape by providing the inmates with Google Maps information, reports CNN.

Officials say Nooshafarin Ravaghi, 44, befriended one of the fugitives and taught English to Nayeri, the presumed mastermind of the jailhouse getaway.

However, Ravaghi, who teaches at the Rancho Santiago Community College in Orange County, is just one of about 10 people arrested in connection with the escape within the past week, Hallock said.

Nayeri faces charges for kidnapping, aggravated mayhem, torture and burglary. He has been in custody since September 2014.

Tieu is accused of murder, shooting at an inhabited home, gang activity and attempted murder. He was held on a $1 million bail and had been in custody since October 2013.

Duong also faces a host of charges, the most serious being attempted murder. He was taken into custody last month and held without bail due to an immigration hold.

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