SAN FRANCISCO -- Ronald Schouten, 44, who was identified as a person of interest in Monday's bomb scare at a San Francisco Starbucks store and who was arrested Tuesday on an unrelated bench warrant, was charged Wednesday with burglary.

The burglary charges stem from an incident separate from the bomb scare, and police said this afternoon they didn't know whether Schouten would be charged for the Starbucks incident.

Schouten was identified Tuesday as a person of interest in the bomb scare at a Starbucks store at 1401 Van Ness Ave. that prompted street closures and evacuations after an employee found what San Francisco police Sgt. Neville Gittens described Monday as an "improvised explosive device" on the restroom floor around 1:15 p.m. A police bomb squad defused the device at about 2 p.m. that day.

Schouten was scheduled to appear before a San Francisco judge Monday as part of an earlier case against him for possession of narcotics. He failed to do appear that day, San Francisco District Attorney's office spokeswoman Debbie Mesloh said today.

His absence resulted in the issuance of a bench warrant, on which Schouten was arrested Tuesday afternoon.

Wednesday, in addition to setting a date of Jan. 23 for Schouten's preliminary hearing on charges of possession of narcotics, Judge Donna Little recognized burglary charges against Schouten relating to an alleged shoplifting incident that occurred the same day as the bomb scare.

Schouten is suspected of shoplifting from a business in the neighborhood of the Van Ness Avenue Starbucks and is scheduled to return to court Friday for a hearing related to that incident, according to the San Francisco Police Department's public affairs office.

Gittens said Schouten faces one count of burglary, one count of receiving stolen goods and one count of possession of burglary tools, all felonies.

Schouten, who has not been charged in connection with the bomb scare, gave police an account of what happened Monday afternoon during an interview about the Starbucks incident. Gittens today characterized that account as "accurate," but declined to say what it entailed.

Gittens said that the Bureau of Alcohol, Tobacco, Firearms and Explosives is doing lab work to determine exactly what the device was, and to whom it belonged.

"Because of the seriousness of this case it is important that the special investigations division be thorough in its investigation, and that Mr. Schouten is treated fairly. Depending on the ATF's analysis of the event, charges may or may not be filed," Gittens said.

ATF spokeswoman Marti McKee confirmed Wednesday night that bureau agents "picked up the remnants from the device this afternoon" and took it to the ATF's Bay Area lab.

The testing, which was still under way around 6:45 p.m., was expected to determine whether the device was actually explosive, McKee said.

She said the bureau would likely inform the Police Department of its results sometime soon.