Olivia Ambrose, the 23-year-old Wenham woman who went missing on Saturday night in Boston, has been found alive.

Francesca Ambrose, Olivia’s twin sister, confirmed to MassLive her sister was found alive on Tuesday. The news came shortly after Boston Police publicly shared information on a potential person of interest.

Police later confirmed the news that Olivia had been found, and said she was transported to an area hospital for evaluation purposes. Reports indicate a man was arrested in Charlestown in connection to the disappearance.

”The Ambrose family is so grateful for the monumental efforts of the Boston Police Department and the MBTA and Transit police who have worked tirelessly over the last three days to bring Olivia home," Gina Addis, a family spokesperson said in a statement.

“They also want to thank all of the staff at Hennessy’s Bar who have been so helpful since Olivia went missing. The Ambrose family is also so appreciative of all the efforts, prayers and good wishes of their friends, family and complete strangers who have helped in the efforts to find Olivia. And finally, they want to thank Olivia’s co-workers at Toast who sprang into action and were instrumental in getting the word out. The family is overjoyed.” Addis added.

Olivia, who recently moved to Jamaica Plain and works at Toast, Inc. in Boston, went missing after a night out with her sister and a large group of friends at Hennessy’s bar in Boston on Saturday, Jan. 19.

Francesca and friend Kate Collins said they last saw Olivia while dancing in front of a stage inside Hennessy’s, around 10 p.m. The night was “nothing out of the ordinary,” according to Collins.

At one point, Olivia followed out a man who got thrown out of the bar, according to Francesca. Around 11:04 p.m., the pair left the pub together and later went their separate ways. Boston Police later determined that the man she first left with was not involved in her disappearance.

At around 11:42 p.m., Boston Police said two unknown men were seen inviting Olivia to walk with them around Congress Street and State Street. One of the men appears to talk while another places his arm around her and directs her toward the State Street MBTA stop.

About 20 minutes later, at 12:01 a.m., police said she exited at the Community College stop on the MBTA Orange Line in Charlestown, according to police. She was seen with the same man, still with his arm hung around her. Police said surveillance footage revealed the second man was no longer with them.

Around 10 minutes pass before Olivia and the unknown man could be seen walking together near Green Street, toward Bartlett Street. Before her iPhone died, its last location indicated she was in the area of the Bunker Hill Housing Development, by Corey Street and Walford Way.

The Ambrose family utilized Hennessy’s pub as a sort of command center on Monday, the Martin Luther King Jr. holiday, to hang up posters around the area and share the news of Olivia’s disappearance on social media, as Boston Police simultaneously tried to contain information on the investigation from being shared too far on social media and in news outlets.

“Everyone is just trying to go about finding her, you know,” said friend Kate Collins, who works with Francesca.

The work of the Ambrose family, loved ones and Boston Police paid off when Olivia was found alive on Tuesday.

A press conference will be held by Boston Police at their headquarters at 6 p.m. on Tuesday.

MassLive was on scene in Charlestown on Tuesday afternoon: