Released Hostage Peter Theo Curtis Back in US

Curtis was held by Syrian militants for nearly two years.

— -- American writer and journalist Peter Theo Curtis, who was held captive for nearly two years by Syrian militants Jabhat al-Nusra, returned to the United States Tuesday, two days after his captors released him, his family said.

Curtis, 45, flew from Tel Aviv, Israel, arriving at Newark Liberty International Airport in New Jersey, and then flew on to Logan International Airport in Boston, where he met his mother, Nancy Curtis, according to a statement from his family.

"I have been so touched and moved, beyond all words, by the people who have come up to me today -- strangers on the airplane, the flight attendants and, most of all, my family to say welcome home," he said, according to the statement.

He also thanked the "U.S. officials who have worked on my case" and the government of Qatar.

His mother said she was "overwhelmed" to have her son home.

How Hostage's Mother Reacted When She Learned Son Was Freed

Peter Theo Curtis Released by Captors in Syria

US, UK Closing in on Identity of Foley Executioner, Sources Say

US Military Launched Secret Rescue Operation in Syria for James Foley, Other Americans

"I am overwhelmed with relief that this day has come and my son is standing beside me," Nancy Curtis said. "But this is a sober occasion because of the events of the past week. My heart goes out to the other families who are suffering."

Curtis' return home came as U.S. officials said they were closing in on identifying the ISIS executioner who killed Foley. Prior to his death, Foley had been held hostage by ISIS for two years.