Article Published: Friday, April 15, 2005 - 10:04:27 PM PST

By Marshall Allen, Staff Writer

ARCADIA -- Two men were arrested Friday after one allegedly pulled the pin on a hand grenade during a routine traffic stop, then held police at bay for about five hours before surrendering, authorities said.

The confrontation began at 12:38 a.m. Friday after the men were pulled over in the parking lot of Motel 6 at 225 Colorado Place, police said. The motel was evacuated and traffic diverted during the standoff.

Ryan Michaelson, 20, of Temple City was booked on suspicion of transporting an explosive device. He is being held in the Arcadia city jail on $25,000 bail.

Andrew Hernandez, 32, of Rosemead, was booked on suspicion of transporting an explosive device, possession of an explosive device, assault with a deadly weapon on a police officer and an outstanding warrant. He is being held at the L.A. County jail on $1 million bail.

Michaelson was driving a Plymouth minivan and Hernandez was in the passenger street when Arcadia police officers pulled the vehicle over for an equipment violation, said Sgt. Roy Nakamura of the Arcadia Police Department.

As officers asked for identification, Hernandez allegedly produced a hand grenade and pulled the pin, police said. The officers immediately backed away and started negotiating with the suspect. Michaelson got out of the van and was taken into custody, authorities said.

As Hernandez had a cell phone, an Arcadia hostage negotiator, the police dispatcher and the L.A. County Sheriff's hostage negotiation team were able to convince him to surrender, police said.

The grenade was then detonated at the scene by the sheriff's bomb squad, police said.

Authorities said they do not know why Hernandez had the grenade, or about his intentions. The case is being investigated by the Arcadia Police Department.

THERE IS NOTHING ROUTINE ABOUT A TRAFFIC STOP!!!!