Hundreds of Las Vegas shooting victims filed multiple lawsuits in Los Angeles Superior Court Monday. The largest of the five new lawsuits was filed on behalf of 450 people who were "either injured in or witnessed" the Route 91 Harvest shooting in October, Reuters reported.

Victims have accused Mandalay Bay Resort and Casino operator MGM Resorts International of failing to "properly monitor" the activities of terrorist Stephen Paddock, who killed 58 people when he fired hundreds of rounds into the festival crowd from his room at the hotel. MGM Resorts International and its Mandalay Corp subsidiary are also accused of not properly training employees and failing to institute "adequate" safety precautions.

Live Nation, which organized the festival, is alleged in suits to have been "negligent" in ensuring proper exits were in place and that event staff members were trained for an emergency. Paddock's estate has been sued for assault and battery. Paddock, as previously reported, is believed to have made multiple high-dollar real estate investments in California and Texas.

"Los Angeles is a better venue for fairness for our clients," attorney Chad Pinkerton, who filed the suits alongside Mo Aziz, told ABC News Monday. MGM Resorts International, for example, might have advantages in Nevada-based cases due to the tens of thousands of people the company employs in the state. Pinkerton added that the majority of clients are from California and have been "getting their treatment here."

Slide Fire Solutions, which manufactured the bump stock used by the terrorist during the attack, was not named in any of the suits filed Monday.