Eight security guards in King County Metro Transit’s downtown tunnel were fired last month after the Sheriff’s Office discovered they had criminal records.

Two of the guards had warrants out for their arrest.

Their records came to light after one guard filed a police report about an incident in which she was a victim.

A deputy investigating her complaint found a warrant for a drug offense, prompting a broader review of all private security officers working for Metro, sheriff’s spokesman Sgt. John Urquhart said.