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Laura Szendrei's funeral was attended by members of the Hells Angels who police say are friends of the girl's family. ((CBC))

A teenager slain in a daytime attack at a suburban Vancouver park was laid to rest this week in a private family ceremony that was also attended by Hells Angels, police say.

Delta police Sgt. Sharlene Brooks told reporters Thursday that police were aware the Angels attended the funeral of 15-year-old Laura Szendrei.

"They were there to pay tribute to friends whose daughter was tragically taken from them," the police spokeswoman said. "That's all I'm going to say."

Brooks appeared uncomfortable with the question and wouldn't say if the police investigation was focusing on a possible connection to the biker gang.

Investigators are working on more than 150 tips they have received in connection to Szendrei's killing.

"At this point we're not in a position, we're not able to say anything definitively," she said. "The Delta police are keeping a very broad perspective and we're considering any and all possibilities until we have evidence to determine otherwise."

Person of interest sought

Szendrei was found after being badly beaten Saturday in a park in Delta, south of Vancouver. She died from her injuries in hospital Sunday.

Police are pleased with the public response, but are appealing for anyone with more information to come forward, said Brooks.

Police particularly want to hear from anyone who might have been in the wooded trail area in Mackie Park between 9 a.m. PT and 2 p.m. PT.

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Sgt. Sharlene Brooks said police have received more than 150 tips about Szendrei's killing but are appealing for more information. ((CBC))

Police said Sunday they were seeking a person of interest in connection with the slaying.

He was described as a Caucasian between 16 and 25 years of age, with a medium build. He was wearing a white short-sleeved shirt and knee-length, cargo-style shorts. He was last seen exiting Mackie Park at about 1:15 p.m. PT on Saturday.

No arrests have been made.

Police are not ruling out any theory in their investigation, and say they still do not know if the killing was random or targeted, Brooks said.