Nicholas Brendon, actor known for 'Buffy the Vampire Slayer,' apologizes for 'unacceptable behavior' that led to arrest

Former "Buffy the Vampire Slayer" star Nicholas Brendon apologized Monday for a public disturbance that resulted in his arrest in Boise, Idaho, over the weekend.

Saying "I can offer an explanation but I make no excuse for my unacceptable behavior," Brendon, 43, wrote on his Facebook page that for five days prior to his arrest around 11 p.m. Friday he had "been taking prescription pain medication to help me manage a cyst behind my knee cap, which is scheduled for corrective surgery on Monday morning. I made the poor decision to mix this prescribed medication with alcohol. The result was embarrassing and unacceptable."

NBC affiliate KTVB in Boise reported that police were called to a disturbance in the lobby of an unidentified downtown hotel at 9:30 p.m. Friday. Police said Brendon, who was appearing at the Tree City Comic Con, showed signs of intoxication and refused their commands to stay seated while officers spoke with witnesses. He was arrested when he tried to walk away.

According to staff at the hotel, Brendon broke a decorative dish. The actor played Alexander "Xander" Harris on the hit TV series "Buffy," which aired from 1997-2003. Brendon now has the recurring role of technical analyst Kevin Lynch on the series "Criminal Minds."

"I intend to seek appropriate treatment and therapy for my medical ailments as well as my emotional demons," Brendon wrote. "Again: I apologize. Those two small words don't begin to express my regrets, but they do mark the beginning of my recovery. During this difficult time, I appreciate understanding as I pursue rehabilitation -- and I value support as I earn redemption with my family, friends, and fans."