Someone graffitied the mural last night, obscuring the original artist's work.

Every night, the anonymous artist graffitis the abandoned warehouse.

Despite the park's rules, teenagers were graffitiing the old pavilion under cover of dusk.

Teenagers graffiti the abandoned train with colorful characters overnight.

The alley smelled of paint, and graffiti covered the walls in wild colors that brightened the neighborhood.

The museum hosted a panel discussion about digital graffiti and its impact on online communities.

The graffiti bomber climbed onto the abandoned railcar at midnight to paint a huge mural along the side.

The graffiti artist was commissioned by the neighborhood to restore the historic mural, proving his work was art rather than vandalism.

Local graffiti artists transformed the abandoned factory into an outdoor gallery overnight.

The graffiti bombers tagged the old subway tunnel before dawn, leaving colorful murals across the concrete.