Las Vegas shooter acquired weapons over decades, lived secret life: police

Mike Blake | Retuers

Police crime scene tape marks a perimeter outside the Luxor Las Vegas hotel and the Mandalay Bay Resort and Casino, following a mass shooting at the Route 91 Festival in Las Vegas, Nevada, U.S., October 2, 2017.

The gunman responsible for the deadliest mass shooting in modern U.S. history meticulously planned the event and spent decades acquiring weapons, while he lived a secret life, Las Vegas police said on Wednesday.

Police also told a news conference that 317 of the 489 people injured in the Las Vegas shooting have been discharged from hospitals.

There was no evidence at this point to indicate that the mass shooting in Las Vegas this week was terrorism, a Federal Bureau of Investigation agent told a news conference on Wednesday.

FBI Special Agent in Charge Aaron Rouse also said federal authorities have questioned the girlfriend of the gunman and no one has been taken into custody as a suspected accomplice.

—CNBC contributed to this report.