RENO, Nev. — A gunman holding a hostage opened fire from the eighth floor of a luxury high-rise condominium in Reno, Nev., on Tuesday, shooting for about 20 minutes onto the streets below, the authorities said. No injuries were reported.

The man died Tuesday after a SWAT team descended on him while he was barricaded at the high-rise, known as the Montage, Deputy Chief Tom Robinson said. It was not immediately clear whether he was killed by police gunfire or his own. No one else, including the hostage, was hurt.

The gunman’s name has not been released. Chief Robinson described him only as a young adult.

The condominium tower is surrounded by some of downtown Reno’s most popular casinos, and the gunfire brought eerie echoes of the Las Vegas rampage that killed dozens two months ago. But aside from the gunman no one was reported hurt in Tuesday’s attack, as the streets were mostly empty on a cold weeknight.

Stephen Paddock, the man who opened fire on Oct. 1 in Las Vegas from the Mandalay Bay hotel and casino onto an outdoor concert below, killing 58 people, had owned a unit at the Montage. Records show he sold the property last December.