PROVIDENCE, R.I. (AP/WPRI) — A Rhode Island State Police detective was among those in the crowd when a gunman opened fire at a country music concert in Las Vegas, killing more than 50 people.

The retired head of the state police, Steven O’Donnell, said that his son, 26-year-old Conor O’Donnell, called him during the shooting.

O’Donnell says he was sleeping when he got the call, and he could hear rounds in the background as Conor told him he was OK. He says his son told him to turn the TV on, then they lost contact for about an hour.

The retired colonel says once he got his girlfriend to safety, his son then worked to help the injured.

O’Donnell says both are physically OK.

Rhode Island State Police Superintendent Col. Ann Assumpico released a statement Monday:

“Detective Conor S. O’Donnell, a six-year veteran of the Rhode Island State Police, was among thousands of people attending the country musical festival in Las Vegas where a tragic mass shooting occurred early this morning. We are relieved to report that Detective O’Donnell was not injured. We also were proud to learn that he joined several other off-duty police officers who assisted victims at the scene.

“The Rhode Island State Police extends its deepest condolences to all the victims and their families, especially those police officers, both on- and off-duty, who were among those shot and killed by the gunman.

“Our thoughts are also with the men and women who serve with the Las Vegas Metropolitan Police Department, as well as all other first-responders who tended to the hundreds of innocent victims killed and injured at the scene.

“The Rhode Island State Police, like most law enforcement agencies, undergoes extensive training to ensure we’re providing the best possible level of safety and security for all residents and visitors to our state. We also urge all Rhode Islanders to remain vigilant, whether at home or while travelling. We encourage people to report any suspicious activity by calling 911 or your local police department. If you see something, say something. We need everyone’s help to keep our state safe.”