Two Sonoma State University students were arrested Sunday on suspicion of felony graffiti vandalism after they were spotted tagging a Highway 101 sound wall in Cotati, police said.

Ethan Zogg and Marco Polanco-Gruszynski, both 18 and residents of Rohnert Park, are also accused of conspiracy to commit felony vandalism, said Cotati Police Chief Michael Parish.

Parish said a neighborhood resident notified police that two men were spray-painting the highway sound wall near the Maple Avenue cul-de-sac, south of Gravenstein Highway and west of Highway 101.

A police sergeant spotted Zogg and Polanco-Gruszynski spray-painting the barrier. Police said they found six cans of spray paint in Polanco-Gruszynski’s backpack. Zogg admitted to previously spray-painting the wall, police said.

Parish said the two are being charged with conspiracy because they executed a plan to go to Maple Avenue to commit their crime. Both were booked into Sonoma County jail and were released on $10,000 bail.

You can reach Staff Writer Martin Espinoza at 707-521-5213 or On Twitter @renofish.