Updated

A man killed his two young children by throwing them off the 15th floor of a landmark South Beach hotel and then jumped to his own death Saturday, police said.

Edward Van Dyk, 43, tossed his two sons, ages 4 and 8, to their deaths around 8:20 a.m., Miami Beach Police spokesman Bobby Hernandez said. Authorities did not release the names of the two boys.

The children's mother, Qinuo, 40, was not physically injured. Hernandez said the family was vacationing from Alton, Illinois, at the Loews Hotel in South Beach, where the couple were celebrating their 10th wedding anniversary.

Qinuo Van Dyk heard one of her children screaming from an adjacent hotel room. When she walked into the room she saw her husband going over the balcony, Hernandez said.

When she looked over the railing she saw her husband and two children lying on the mezzanine roof, which is about two floors off the ground.

She told police that the couple had been having marital problems for the past six months, but had not been arguing right before the incident, Hernandez said.

People in neighboring rooms told police they did not hear anything.

"It's a terrible tragedy. It's unfortunate that this gentleman was so selfish and in an effort to get back at his wife he took the two most loved people in the world away from her," Hernandez said.

Hernandez said Qinuo Van Dyk does not know what prompted her husband, a radiologist at Alton Memorial Hospital, to do this.

"There was no indication that he would be capable of doing something as horrible as this," Hernandez said. "She's totally in shock that this has happened and doesn't know why he did what he did."

Police wheeled the three bodies into the hotel on gurneys covered in red sheets and loaded them into a medical examiner's van. Outside the hotel there were few indications of the events, except two police cars parked in front.

Hotel guest Christopher Carreras, from New York, who is staying on the 14th floor, said he could see where the victims had fallen.

"They already had tents covering the bodies. You can't see nothing. It's like a big awning," said Carreras.

A Loews Hotel spokeswoman in Miami would not comment, but said there was an ongoing police investigation.