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Portland's police chief has called out local politicians after another night of riots in the city. 

On Tuesday, Police Chief Chuck Lovell released a statement, saying "our elected officials need to do their part to draw a line in the sand and to hold people accountable."

Protests in the city have continued nightly for three months and have repeatedly turned into riots.

"The violent behavior must end," Lovell said in his statement.

Lovell didn't specify which elected officials he was addressing, Business Insider reports.

However, the Multnomah County district attorney has drawn criticism for saying his office would not prosecute certain low-level offenders arrested at the Portland protests or even during declared riots.

In response to Lovell's statement, District Attorney Mike Schmidt's office released a statement saying: “We continue to prioritize public safety resources in Multnomah County by focusing on the violent crimes occurring at protests and in our community, including the recent and alarming increase in gun violence this summer,” the statement said.