VANCOUVER, Wash. (NewsNation Now) — Tensions boiled over into unrest late Friday following a vigil for a Black man shot and killed by law enforcement in a city near Portland, Oregon.

Mourners gathered in Hazel Dell, an unincorporated area of Vancouver, Washington, where family and friends say Kevin E. Peterson Jr., 21, was allegedly shot Thursday night. The situation before the shooting is unclear but Peterson was shot and killed in the parking lot of a bank. The city is about 12 miles north of Portland.

Hundreds of people gathered for the vigil Friday evening, with some holding signs reading, “Honk for Black lives. White silence is violence” and “Scream his name.”

Nearby, tensions flared between protesters. Video recorded in a nearby parking lot showed two groups of people shouting at each other. Some armed demonstrators gathered near a building they told reporters they were protecting.

The crowds ultimately fizzled out near the vigil but a group of hundreds of protesters later marched through downtown Vancouver. Windows were shattered, flags were burned and federal agents clothed in riot gear surrounded a building — warning people that trespassing on federal property would be subject to arrest.

Multiple videos showed two vehicles facing each other just after midnight on a downtown street. Two shots were heard but reporters at the scene said it didn’t appear anyone was hit.

Authorities declared an unlawful assembly and ordered protesters to disperse. At least one person appeared to have been detained, according to video posted online by a journalist.

Family and friends had described Peterson as a former high school football player and the proud father of an infant daughter.

In a statement, Clark County Sheriff Chuck Atkins said a joint city-county narcotics task force was conducting an investigation just before 6 p.m. Thursday and chased a man into the parking lot of a bank, where he fired a gun at them. A firearm was recovered at the scene, Atkins said.

“The information that I have is that upon entering the parking lot of the bank, the man repeatedly — reportedly fired his weapon at the deputies. The deputies returned fire and the subject was tragically killed. It is my understanding that the man’s firearm was observed at the scene,” Akins said.

Authorities have not named the person who was shot, but Kevin E. Peterson Sr. told The Oregonian/OregonLive the person was his son, Kevin E. Peterson Jr. Atkins referenced the Peterson family in his remarks but did not confirm Peterson was the person who was killed.

“I can say that our agency is grieving as is the Peterson family and the community,” Atkins said. “As the community grieves, I call for there to be a respectful and dignified observance of the loss of life in this matter. There is always the potential for misinformation, doubt and confusion – and there may be those who wish to sow seeds of doubt.”

The investigation has been referred to the Southwest Washington Independent Investigation Team, and the Camas Police Department is taking the lead, Atkins said.

Battle Ground Chief of Police Mike Fort said later on Friday evening that the narcotics task force had contacted a man suspected of selling illegal drugs in a motel parking lot and that he fled on foot with officers following. The man produced a handgun and the officers backed off, investigators said. A short time later, the man encountered three Clark County deputies, all of whom fired their pistols at the man, they added. They did not say the man fired a handgun found at the scene, making it unclear what happened just before the shooting.

The community is a short drive north across the Columbia River from Portland, where racial justice protests have played out nearly every night since George Floyd’s killing by police in May.

Earlier Friday, several people paid their respects to Peterson at the site of the shooting.

Mac Smiff, an organizer of Black Lives Matter protests in Portland, said he knows Peterson’s sister and spent more than five hours at the scene.

“There was a ton of grief, a ton of grief. He’s 21 and has a baby, an infant,” Smiff said. “They’re not sure what happened, why the encounter took place. Everyone was extremely disheveled and confused.”

Jake Thompson, a high school acquaintance of Peterson, said he took photos at the wedding of Peterson’s parents in Portland in 2018. On Friday, he posted a black-and-white photo of Peterson in a suit and bow tie as he flashed a big grin.

“I didn’t sleep much last night,” he said Friday.

Peterson played football at Union High School in Vancouver, Washington, loved sports of any kind and was a big personality who was known and liked by everyone at school, Thompson said.

This story is developing. Refresh for updates.

The Associated Press and NewsNation affiliate KOIN contributed to this report.