The Israeli man who went missing in the Ukrainian city of Uman three days ago has been named as Amir Ohana.
Ohana, 28, was one of 45,000 estimated to have traveled to the city for the Rosh Hashanah holiday.
According to Ohana's family, the young man went out alone to the woods and subsequently disappeared. They have not had contact with him since Monday.
The Israeli Foreign Ministry has joined searches to locate Ohana, whose life may be in danger, as have an initial team of volunteers from the Israeli emergency response organization ZAKA.
Searches by Ukrainian authorities have so far been centralized around Sofyivsky Park, a nearby lake and local hospitals.
Ohana's wife, Meital Tohar, published a Facebook post on Wednesday night asking for the public's help in locating her husband.
"My beloved husband traveled to Uman for Rosh Hashanah, and on his way for solitude in the forest, he disappeared," she wrote. "They have been looking for him for 30 hours with no results. Amir, my love, my heart goes out to you in prayer. Return to me."
"Anyone who sees this message, pray for my righteous husband. Have mercy on me, without him I have no life!!! Pray friends, whoever can," Tohar added.
The Foreign Ministry also addressed the matter, noting that "local authorities, local police and Israeli officials have been tasked with stepping up searches" for Ohana.
"The Israeli diplomatic staff in Ukraine will be reinforced in order to meet the needs of all Israelis who come to observe Rosh Hashanah and Yom Kippur in Uman. They will help search. We are in contact with the family and hope for good results."