The suspect has been identified by police as 23-year old Roberto Carlos Silva Jr, Bellevue Police Department said in a press release on Sunday.
CNN has not been able to determine if Silva has a lawyer.
Police initially responded to a call about a possible bomb inside a moving truck in the parking lot of the drive-in shortly before 9:30 p.m. (10:30 p.m. ET) Saturday and then received other calls about a shooting.
The two victims who were declared dead at the scene have been identified by police as 22-year-old Nathan Pastrana and 28-year-old Ryan Helbert.
Lt. Andy Jashinske said there was a moving truck on fire in the Sonic parking lot but no bomb was found. Police said there was
is no indication that any other suspects were involved.