90-Second Read: Arkansas man arrested after mass shooting threats if Hantavirus triggered lockdown

Aaron Keith Bynum, 20, of Oakland, Arkansas, faces charges of first-degree terroristic threatening and harassing communications following an investigation into threats made online, according to the Marion County Sheriff's Office. Three passengers have died, including a Dutch couple who health officials believe were the first exposed to the virus while visiting South America, The Associated Press reported. Hantavirus is typically spread to humans through exposure to rodents and, in rare cases, can cause Hantavirus cardiopulmonary syndrome, a severe respiratory illness with a fatality rate between 25 percent and 40 percent, according to WHO. An investigation was launched after the FBI received a tip on May 9 from an individual playing an online multiplayer video game with the suspect.

Investigators obtained a search warrant for Bynum's home and on May 15, searched the house in Oakland, where they seized a computer and related accessories. As of May 18, the outbreak on the ship has reached at least 11 cases, nine of which have been confirmed by the World Health Organization. Eighteen Americans are currently under observation at specialized healthcare facilities in the United States designed to treat people with dangerous infectious diseases.

Investigators subpoenaed the game's parent company, which identified Bynum as the owner of the account, officials said. Bynum was taken into custody without incident, according to Sheriff Gregg Alexander. The MV Hondius was still carrying 25 crew members and two medical personnel when it docked at the Dutch port of Rotterdam for disinfection on Monday. Symptoms can rapidly escalate from fever and nausea to life-threatening lung and heart complications.