KOREATOWN, Calif. -- The search is on for three armed bandits who stormed a jewelry store in Koreatown, brutally attacking a security guard with a hammer.

Authorities were called to CC Diamonds in the 3200 block of Wilshire Boulevard at about 11 a.m. Tuesday after reports of screaming and the sound of glass breaking.

A parking lot security guard was severely beaten by the suspects, according to police.

He was rushed to County-USC Medical Center in critical but stable condition after being struck in the face and head with a hammer.

A 27-year-old female was also injured when the suspects attempted to steal her vehicle. She was cut by glass and was expected to be fine.

Two suspects eventually carjacked a Korean man and left the scene in a white GMV Savana van with a California license plate of 6T97736. A third vehicle, a green Toyota van, was also seen leaving the store.

They were last seen driving south on Vermont.

Police say the suspects got away with thousands of dollars worth of jewelry.

The suspects are described as three black males between 20 to 25 years of age, between 5-feet, 8-inches and 6-feet tall and weighing about 180 to 200 pounds. One suspect was wearing dark pants with a white long sleeve hooded sweatshirt. A second suspect was wearing a grey hooded sweatshirt, and the third suspect was wearing a dark baseball cap, dark jacket and dark pants.

They are considered to be armed and dangerous.

Anyone with information is asked to contact detectives at 213-382-9103 or 1-877-LAPD-24-7. Anonymous tips can be made through Crime Stoppers at 1-800-222-TIPS (800-222-8477) or by texting to phone number 274637 (C-R-I-M-E-S) with the letters "LAPD."