Three days after 15-year-old Laura Szendrei was found dying in a Metro Vancouver park, police are still unable to give worried Delta residents any answers about what happened.

Investigators into the murder say they're not able to say whether the brutal beating was targeted or random.

"We too want to be able to reassure the public, but we have to be straightforward with them and provide the information that we can, and let them know that, at this point, we're not certain whether this was a targeted situation or if this was random," Sgt. Sharlene Brooks told CTV News.

Investigators aren't ruling out anything right now, including possible connections to previous incidents.

Police have confirmed that there were two pepper-spraying incidents at local parks on Sept. 17. Earlier this year, two women were hit from behind with a blunt object while walking or running alone in separate incidents in the community.

"There are indications that it's not linked to any other incident; however we're not discounting any possibilities at this time," Brooks said.

Police were in the air and on the ground Tuesday, hunting for clues along trails and in wooded areas in Mackie Park, where Szendrei was beaten to death on Saturday.

Nearby resident Chenoa Robertson told CTV News that the park is popular with young people.

"When I was 15 years old, me and my friends used to come and walk through there. Students cut through there all the time," she said.

Now, Robertson is too frightened to go for a run through the park.

"I don't think I'll be running anywhere."

With a report from CTV British Columbia's Maria Weisgarber