The Public Ethics Commission voted unanimously Monday night to open an investigation into the campaign contributions connected to a contract bid to provide security services at City Hall.

The PEC’s decision is in response to a recent letter sent by Oakland City Auditor Courtney Ruby’s office that said ABC Security – an Oakland-based company – may have violated the law when it donated money to Council members while it was bidding on a $2 million contract to provide security for Oakland City Hall.

Political donations made by Sam Tadesse, managing partner at Marina Security, which bid on the contract, also will be investigated.

The commission will now wait for a preliminary fact gathering report from its executive director, Daniel Purnell.

Separately, the City Council is scheduled to take up a vote on the contract today at its regularly scheduled meeting.

Check back with Oakland Local Wednesday for further details.