The man who killed 59 people and injured hundreds more in Las Vegas researched other locations where he could have possibly pulled off a similar attack.

NBC News reported Thursday Stephen Paddock researched hotels in Boston and Chicago that overlooked major gatherings of people. In Chicago, he went so far as to book a hotel room during the Lollapalooza music festival in Grant Park but didn't actually end up showing up during the early August festival.

The report indicated Paddock also researched hotels near Fenway Park, the home of Major League Baseball's Boston Red Sox. No hotels overlook the stadium.

Paddock opened fire late Sunday night on the Route 91 Harvest Festival, a country music festival with tens of thousands in attendance.

Shooting from the 32nd floor of the Mandalay Bay Casino and Hotel, Paddock was able to fire for about an hour before police stormed the hotel room. He had turned the gun on himself before they were able to arrive.

Reports indicate Paddock asked for a hotel room overlooking the festival.

He had clearly planned out the attack, bringing 10 suitcases of guns and ammunition into the hotel room and rigging a room service cart with video cameras so he could see who was approaching the room.

Police have still not discovered a motive for the attack.