PORTLAND, Ore. -- Portland police is asking for the public's help finding criminals involved in the anti-Trump protests and riots over the last week.

More than 100 people who were arrested during the protests have been cited, but police are looking for more suspects who haven't been caught.

The Portland Police Bureau has released suspect photos using the Twitter hashtag #CanYouIDMe, on their website and on their official Facebook page.

Spokesman Pete Simpson says the response has been overwhelming, with one person identified and good leads on several others. Police expect to publish more pictures in the near future.

Click to see some of the images police released.

Portland police identified one of the vandalism suspects late Monday night as 20-year-old Mateen Abdul Saheed. In cooperation with Crime Stoppers of Oregon, they are offering a reward for help in finding him.

There is a felony warrant out for the arrest of Shaheed, who police describe as a 6-foot-1, 200-pound black man. Detectives served a search warrant at his home on Monday but he has not been found.

A cash reward is available for information that leads to an arrest. To submit an anonymous tip, text CRIMES (274637) and type 823HELP, followed by the tip; click here to submit an online tip; or call 503-823-4357.

Police are also asking anyone with information, pictures or video that could be used to identify suspects to submit them to the investigators or file a report by clicking here. Police clarified that investigators do not need links to social media sites as those have already been obtained. For larger files, police ask that people use Dropbox or Google Drive and email the links.

Many of the people arrested over five days of protests made their initial appearances in court Monday afternoon. But very few were arraigned and charged, due to the ongoing investigations, according to a joint statement released Monday by the Portland Police Bureau and the Multnomah County District Attorney's Office.

Most of the people who were facing criminal charges of attempted assault on a peace officer and disorderly conduct will now receive citations.

Some defendants feel they never should have been arrested. John McKay said he was coming through downtown, not to protest, but to get to a friend’s house.

The only thing he did was stop and look, then he says he followed police orders to move south.

“I was about two blocks down on the sidewalk from all the action that was happening, and the cops pushed forward and they squeezed us together and I couldn’t go anywhere else, and I was arrested,” McKay said.

"Nearly all of those arrested over the past several days have received or will receive traffic citations for violating Oregon Revised Statute 811.535: failing to obey a police officer," the statement reads. "These citations will require a court appearance in approximately 30 days and carry a fine of up to $1,000."

The joint statement says the sheer number of arrests during protests over the last several days has been an exceptional event and the charges being "no-complainted" on Monday is not unexpected.

But it did come as an unexpected surprise to some of those charged and their supporters who packed the courtroom. They reacted with smiles and subdued calls of "yes!"

Some of those arrested may be criminally charged at a later date.

"The criminal charges were not filed Monday but are likely to return after reports, video, etc. work finished," Portland Police Sgt. Pete Simpson told KGW.

Further decisions about prosecution will be made after the investigations are completed and sent to the D.A.

Simpson said that for suspects who were not arrested, does not mean they won't be held accountable for any damage they did.

The Associated Press contributed to this report