City police arrested a native who blocked a cement truck from entering the Kingspan site in northwest Brantford this morning.
Police took action after the native refused to move from the entrance to the construction site.
Earlier this morning about half a dozen natives stopped trucks. The trucks tried again about 9 a.m.
Only one arrest was made.
At 10 a.m., the trucks still had not entered the site.
An hour later, workers were leaving the site.
Police have blocked access to the Kingspan area.