A man has been arrested following an explosion at the Santa Maria courthouse in California, where he was scheduled for an arraignment on felony firearm charges. The suspect, identified as Nathaniel McGuire, is accused of intentionally throwing an explosive device into the courthouse with the intention of killing deputies and a judge. The blast injured five individuals and prompted a lockdown of the courthouse. Authorities have described the incident as an isolation event, emphasizing that there is no connection to any terrorist groups. Additional investigations are underway regarding McGuire’s past behavior, which includes previous arson acts.