A Moscow-led church in the central city of Zaporizhia refused to bury the one-year-old boy killed on New Year's Eve because he was christened by a rival church overseen by Kiev.
Local media reported that the boy's bereaved father punched the priest in anger in an incident that has sparked a new war of words between the two branches of Ukraine's main faith.
The Ukrainian Church splintered into Moscow- and Kiev-led branches when the Soviet Union collapsed in 1991.
The bad blood between the two has been heightened by the war between Russian- and Kiev-backed sides in eastern Ukraine that has killed more than 10,000 people in nearly four years.
The Moscow-led denomination is much larger and also the dominant one in Zaporizhia -- a city of over 700,000 people that was founded more than 1,000 years ago and is now an industrial hub.
Brawl In Church
The family of the boy, killed as he was being led out of the apartment building by his father, belongs to the Kiev Patriarchate.
His father, Roman Polishchuk, said the priest of the Moscow-led church they turned to told the family he could not perform the burial ceremony.
"The priest said our baby was unchristened and our church was a sham," Polishchuk told the local Forpost news site.
"My wife cried and threw herself before him on her knees, but this did not help."
Priest Yevgen Molchanov said the father then punched him and a small brawl broke out inside the church before the family was forced to leave.
The parents eventually took the baby's body to the church where he was christened to perform the burial rights.
Priest Molchanov said he had no choice because those were the rules of his faith.
"I am very sorry. I feel for those people," he told Forpost.
"But there are certain lines I cannot cross. A child christened by the Kiev Patriarchate remains unchristened," Molchanov said.
"And the Kiev Church itself is a hoax."
A spokesman for the Kiev Patriarchate said such incidents had happened before and only fed frustrations among the faithful in Ukraine.
"There is no official document from the Moscow Patriarchate saying this must be the case," Yevstratiy Zorya wrote on Facebook.
"This is all completely arbitrary and based on some verbal orders that are issued under the guise of secret 'canons'."
(Except for the headline, this story has not been edited by NDTV staff and is published from a syndicated feed.)