(CNN) -- A 19-year-old Japanese student is presumed dead after she lost her balance Sunday and fell into the churning waters of Niagara Falls, police said Tuesday.
The student, whose name was being withheld pending notification of her family, was straddling the railing with an umbrella in her hand and fell above the brink of the Horseshoe Falls on the Canadian side of Niagara, according to a news release from the Niagara Parks Police.
"This is the first accident of its kind I can recall in my 35 years of policing," Niagara Parks Police Chief Doug Kane said Tuesday.
A search turned up no sign of the student, but on Monday searchers in a helicopter from the Erie County, New York, sheriff's department spotted the body of a male in the falls' turbulent whirlpool, police said.
The body was recovered by the Niagara Parks Police Service with the assistance of the Whirlpool Jet Boat Company and does not appear to be related to any previously reported incidents, according to the news release from the parks police.
Kane said Tuesday that the male body had not been identified.
After the student disappeared on Sunday, members of the parks police, Niagara Regional Police, Niagara Falls Fire Department, New York State Parks Police and the Erie County sheriff's helicopter unit began to look for the woman.
The student's fall was caught on surveillance video but police have not released the tape. "It appears from the review of surveillance video that this incident was a tragic accident," the parks police said in their news release.
"It is now a recovery issue," Kane said Tuesday. "She is officially listed as a missing person until an actual body is confirmed."
Parks police were working with the Japanese consulate general to notify the victim's family, the news release said.
"People are reminded to observe the signs along the retaining wall," Kane said. "We have to strike a balance of allowing people the opportunity to view the falls while still providing adequate levels of safety and security."