Police say the man tried to grab a female student near Collett and La Sierra avenues back on Sept. 21. The girl got away after a passerby yelled at the suspect to let her go.
The second incident happened on Wednesday near La Sierra and Golden avenues. In that case, another female student said an unknown man follower her.
Police think the same man is involved in both incidents. The suspect is described as a white male, in his late teens or early 20s, between 6 feet and 6 feet and 4 inches tall with a thin build, dark blond hair and green eyes.
If you have any information about the incidents, you're urged to call Riverside police at (951) 353-7119.