Portland Police seized weapons Sunday during downtown protests, and are sharing pictures via Twitter.

Police say they've confiscated sticks, a slingshot, a shield and what appears to be brass knuckles and a machete. The weapons have been found with opposing groups, according to the bureau's Twitter feed.

Here's what's been shared:

Weapons or things that can be used as weapons may be seized by police. Criminal conduct may result in arrest. — Portland Police (@PortlandPolice) June 4, 2017

These are some of the items that have been seized so far today. pic.twitter.com/VsfenLPZhS — Portland Police (@PortlandPolice) June 4, 2017

Officers have made an arrest and seized several weapons from the suspect. pic.twitter.com/5IUUvqLHii — Portland Police (@PortlandPolice) June 4, 2017

Projectiles being thrown at opposing groups or police will result in police action, including impact weapons or chemical munitions. — Portland Police (@PortlandPolice) June 4, 2017

Another makeshift weapon seized. Homemade slingshot. pic.twitter.com/TZ64RZPAoX — Portland Police (@PortlandPolice) June 4, 2017

More weapons being seized by police. pic.twitter.com/yiYfAal3Yi — Portland Police (@PortlandPolice) June 4, 2017

Additional makeshift shields seized. pic.twitter.com/s6yUFLx1kZ — Portland Police (@PortlandPolice) June 4, 2017

Several of the weapons seized so far today. pic.twitter.com/U6z2jO0BVu — Portland Police (@PortlandPolice) June 4, 2017

Several of the weapons seized so far today. pic.twitter.com/U6z2jO0BVu — Portland Police (@PortlandPolice) June 4, 2017

Several of the weapons seized so far today. pic.twitter.com/U6z2jO0BVu — Portland Police (@PortlandPolice) June 4, 2017