SAN JOSE, Calif. (KCBS) — Two stabbing incidents this week at San Jose parks both appear to be gang-related, police said.

Investigators said it’s still unclear whether an attack Tuesday at Great Oaks Park is connected to an attack that injured two teenagers Monday at Starbird Park.

A woman who witnessed the Monday night attack told KCBS reporter Matt Bigler the two victims were with their mother when they were assaulted by a group shouting gang epithets around 6:10 p.m.

The attackers fled in a car and the 16-year-old and 18-year-old victims were taken to the hospital for treatment.

On Tuesday, a group of 10 attacked another group at Great Oaks Park around 6:45 p.m. Police said the attackers first asked whether the victims were gang-members, and then set upon them with bats, bottles and knives when they denied any gang affiliation.

Two victims were taken to the hospital. A third victim refused treatment at the scene.

The San Jose Mercury News reports none of the victims in either attack suffered life-threatening injuries.