PLYMOUTH - Two workers from Nepal whose car plunged into Plymouth Harbor Sept. 26 have died at Boston Medical Center

Two workers from Nepal whose car plunged into Plymouth Harbor Sept. 26 have died at Boston Medical Center.

Hishi Nagarkoti, 27 and her boyfriend Sunil Gurung, 25, had been in critical condition at the hospital since rescuers pulled them from their Jeep Cherokee after it had been submerged for more than half an hour.

A friend of the couple, Jean Zimmerman Haist, said that they passed away within minutes of each other just before 10 p.m. Thursday night, after Gurung’s father and 21-year-old brother arrived at the hospital.

Zimmerman Haist said that Nagarkoti’s father, four sisters and brother-in-law ‘‘had been with their spiritual leaders praying and preparing for their loved ones’ passing all week.’’

‘‘After the final prayers, with the hospital staff assisting, comforting, and explaining circumstances, Sunil and Hishi passed together just before 10 p.m.,’’ Zimmerman Haist told The Patriot Ledger in an email.

Family members have said that last week’s accident probably occurred because Nagarkoti was trying to teach Gurung how to drive the Jeep Cherokee she just bought. Gurung did not have a drivers’ license.

The two were in a parking lot behind The Lobster Hut where Nagarkoti worked, and witnesses said they saw Gurung behind the wheel when the Jeep backed up suddenly and then gunned forward, shooting over a 2-foot wall and landing upside-down in the water.

Several bystanders said it appeared the two were arguing before the accident. But in its aftermath, friends, coworkers and neighbors said the two had a peaceful relationship.

Family members later said they believed Nagarkoti was giving Gurung a driving lesson, and that onlookers likely misinterpreted the expressive Nepalese way of talking with arguing. Environmental Police have also said the accident seems a lesson gone wrong rather than the tragic end of an argument.

Gurung worked at the Shangri-La, a restaurant specializing in Nepalese and other South Asian cuisine. The couple were part of a small community of Nepalese workers who come to Plymouth to work in the town’s hospitality industry.