Man sought over Sydney glassing

A man has been treated in hospital after being glassed in the face during an argument in Sydney's south.

A 40-year-old man was with a group of friends at a hotel in Peakhurst just before 8pm (AEST) on Thursday when he began arguing with another man, police said.

The second man punched the 40-year-old before hitting him with a schooner glass and then leaving the scene.

Emergency services were called and the injured man was taken to St George hospital, where he was treated for cuts to his face.

Police are seeking a man of Caucasian appearance, about 40 years old, with blonde hair and of medium build and last seen wearing a yellow jacket, black pants and white shoes.