St. Joseph's said in a statement that the university learned Sunday that Dombroski had been reported missing.
Mark Dombroski, 19, of DE, was last seen at 1:15 a.m. Sunday at a bar called The Dog House, officials said.
It says he is about 6 feet tall with close cut blonde hair and was last seen wearing khaki trousers, a green T-shirt and black shoes.
Four photos of Dombroski were released by officials.
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Authorities in Bermuda say a 19-year-old St. Joe's University freshman - visiting the island as part of a school rugby tour - is missing and they're appealing to the public for information. Authorities have been with her family "shoulder-to-shoulder throughout this ordeal", she said.
Police circulated a flyer with his photos and asked hotels and other businesses in the area of Dombroski's last confirmed sighting to review their private security footage.
Dombroski was supposed to leave the island on Sunday with the rest of the team, but was not on the return flight.
"He was last seen at Dog House on Front Street at 12am this morning".
Police said it was too early to suspect foul play and that they were treating the disappearance as a missing person case.
Saint Joseph's issued a statement saying it "continues to pray for his safe return". We will update when new information becomes available.