WEST COVINA (CBS) — A medical marijuana deliveryman was still shaken up on Monday after what he described as a robbery by two men allegedly dressed as ninja warriors.

KNX 1070’s John Brook reports the robbers used the martial arts getup to conceal their identity as they got away with a big bag of marijuana.

READ MORE: Enrollment Down 6% At LAUSD Schools

The assailants were reported dressed in all black with masks over their faces and wielded martial arts batons — known as tong fa — to intimidate the deliveryman around 10 p.m. last Friday at an apartment house along the 800 block of South Sunset Avenue in West Covina, police said.

“After he made his delivery, he was walking back to his vehicle and was approached by two males in their 20s wearing ninja costumes and holding white batons,” said Sgt. Travis Tibbets.

READ MORE: 'Banksy: Genius Or Vandal' Exhibit To Open In Early October

The victim dropped the bag of marijuana and fled the scene, said Tibbets.

The deliveryman was not hurt in the reported robbery, which took place just a short distance from the police station.

MORE NEWS: Latino Restaurant Association Kicks Off DINE LATINO Restaurant Week

Police said the suspects are in their 20s, approximately 5’8″ in height, and thin in stature. Anyone with information on the robbery is asked to call West Covina police at (626) 939-8557.