A 30-year-old man was arrested on Wednesday for allegedly murdering his brother under the influence of alcohol in the Anna Nagar police station limits.
The police said the victim Lourdhu Samy, 26, and his brother Irudhayam alias Anand, 30, were running a cobbler shop on the platform near Kandasamy College.
On Tuesday night, a tipsy Irudhayam quarrelled with his brother, who was standing and allegedly stabbed him with a tool from the shop.
Lourdhu Samy died on the spot.
Irudhayam has been remanded in judicial custody.