A thief broke into the Ward 1 City Council office over the weekend and stole nothing but Councilwoman Regina Romero’s computer tower.

The break-in occurred sometime between Thursday, when Romero last used her office computer, and Monday morning at about 8 a.m. when a council aide discovered the city-owned computer tower was missing at the office.

Tucson police discovered no signs of a forced entry at the office at 940 W Alameda St. The only item reported stolen was Romero’s computer tower, the police report said.

The buildings alarm system was not triggered during the three-day period, and the alarm company doesn’t track when the system is armed or deactivated.

Although it was unclear how the thief entered the building, the police report mentioned Ward 1 staff had lost track of a key that opened an exterior door to a community meeting room about six months ago.

The door is separate from the main entrance, and provides a route to Romero’s office.As part of the investigation, an officer took the computer’s cables and collected some possible DNA samples into evidence.

Romero said she had to refrain from commenting on any details since it’s an open investigation.

“It’s ongoing,” Romero said. “Hopefully, we’ll get to the bottom of it.”

The value of the Compaq-brand computer tower was listed at $1,400.

Contact reporter Darren DaRonco at 573-4243 or ddaronco@tucson.com. Follow on Twitter @DarrenDaRonco