SAN MATEO (KRON) — Women are on high alert after a string of sexual assaults were reported on a San Mateo trail.

The San Mateo County Sheriff’s Office is investigating two reports of sexual assaults Monday in Miramar.

The first incident occurred at 7:05 a.m. in the area of the Mirada West Walking Trail near Magellan Avenue and Mirada Road.

The female victim was walking west from the coastal trail on Magellan Avenue toward Mirada Road when she was approached from behind a suspect who grabbed her and groped her buttocks, deputies said.

The victim described the suspect as a man 20 to 30 years old, 5 feet 7 inches tall, with black hair, dark eyes, a medium build and an olive skin tone. He was wearing a blue beanie and a dark mid-thigh length jacket.

The second victim was in the same area around 5:50 p.m. walking north on the coastal trail north of Magellan Avenue when she was also approached from behind and groped by an unknown suspect.

The victim described the suspect as 18 to 28 years old, 5 feet 8 inches tall and a stocky build. He was wearing a gray hoodie and blue jeans.

According to police, the women didn’t suffer any injuries in the assaults.