This KGW story makes no mention of the suspects being black:

PORTLAND (KGW) – Police were warning bicyclists in Northeast Portland to be on the lookout after two men were injured during separate attacks along Northeast Martin Luther King Jr. Boulevard.

On Saturday night, 20-year-old Andy Sweeney said he was riding his bike near the intersection of Northeast Martin Luther King Jr. Boulevard and Northeast Fargo Street when three teenagers threw a traffic cone at him, hitting him in the face.

Sweeney suffered a concussion and two of his front teeth were shattered from the attack.

“It’s crazy,” said Sweeney. “I don’t really understand their motivation or what they were going for.”

Last week, a 64-year-old man reported that he was also attacked by teens while riding his bike on Northeast Going Street near Martin Luther King, Jr. Boulevard, according to Sgt. Pete Simpson of the Portland Police Bureau.

“One of [the teens] punched him in the shoulder, which knocked him off his bike and he hit the ground,” Simpson said.

The Oregonian ran a similar story, also with no description of the attackers:

Andy Sweeney posted the selfie on Reddit, hoping to find the positive side to the violence that left him with a broken smile on a Northeast Portland street last weekend.

In the photo, the 20-year-old bicycle commuter and recent transplant from the Midwest flashed two shattered front teeth.

“Some kids threw a traffic cone at me while I was riding my bike down MLK,” Sweeney wrote next to the photo of his now-jagged incisors. “Any other (expletive) areas I should avoid?”

Portland police, however, are taking Saturday night’s unprovoked attack of Sweeney near Northeast Martin Luther King Jr. Boulevard and Fargo Street more seriously.

It was at least the second time in less than a week that a group of teenagers had assaulted a bicyclist along MLK.

Last Tuesday night, Bill Lynch, 64, had just crossed MLK as he pedaled home from a garden party when someone in a group of “three to five young people” knocked him off his bicycle on the Northeast Going Street Neighborhood Greenway.

Sweeney clearly desribes the suspects in the Reddit post that got the media’s attention (SpanishMoles is his screen name):

Reportedly one of the other victims tweeted out the same description of the suspects.