A worker picketing in Boucherville, Que., was struck and injured by an SUV this morning during a protest over the Kronos company's two-month-old lockout.

Police said the 64-year-old man was injured at 6:50 a.m outside the Robert Transport company building — a business affiliate of Kronos.

The man suffered serious injuries to his face and is being treated in hospital. Two other people were treated for shock.

About 30 people were protesting this morning as part of a contract dispute with Kronos when a driver tried to enter the site with his SUV and struck one of the protesters.

Longueuil police spokesman Marc David said the 47-year-old driver was arrested for assault with a weapon, but an investigation is continuing.

About 300 workers from the Kronos Boucherville plant have been locked out since negotiations broke down June 15. The company specializes in the production of titanium dioxide pigments, which are used in plastics and construction materials.