UPDATE, 1:28 pm: Half an hour after cancelling the forum, Oregon Opportunity Network says the show will go on.

Policy director Ruth Adkins says the brief cancellation was due to fears the event would be disrupted by protesters.

She writes:

Hello again all – after further discussion amongst partners, we will proceed with this forum after all. To be clear – there have not been any threats of violence, rather it was potential disruption of the event that created concerns about safety and liability.

We ask that all candidates and audience members be respectful and allow for a safe and productive event. We apologize for the confusion.

The forum is once again scheduled for 3 pm today at the First Unitarian Church.

ORIGINAL POST, 12:57 pm: Oregon Opportunity Network has cancelled a mayoral forum on housing and tenant protections after what it describes as "security threats."

The forum was scheduled for 3 pm today at the First Unitarian Church.

It was not immediately clear what security concerns halted the forum. But the sudden cancellation comes the day after protestors demanding rent control shut down the Multnomah County Commission meeting, then interrupted another mayoral forum.

Here is the full announcement:

Due to liability concerns, in consultation with our co-sponsors, Oregon Opportunity Network regretfully is cancelling today’s mayoral candidates forum. We sincerely apologize for the inconvenience.

As small nonprofit organizations working every day on housing, tenant protections and homelessness, we strive for a healthy discourse and safe spaces. We do not have the capacity to handle liability and security threats at our events. Instead, we will get candidates on the record through other means, and will share with the community prior to the May 17 election.