BROOKLYN, N.Y. - Police in Brooklyn are investigating after a delivery man's violent robbery last week was caught on camera.

Police say it happened last Saturday on Walton Street near Union Street in South Williamsburg.

The 20-year-old victim had just made a delivery when four men walked up and threw him to the ground.

Police say the group stabbed the victim in both legs before stealing his bicycle, cellphone, jacket, $70 in cash and a pizza.

The victim suffered a puncture wound to each of his legs and was taken to NYC Health & Hospitals/Woodhull.

Police say the attackers fled towards Union Avenue.

Anyone with information on the case should contact the Crime Stoppers hotline at 1-800-577-8477, or text CRIMES and then enter TIP577, or visit www.nypdcrimestoppers.com.