The victims are OK, but several of them had to be treated for eye irritation.
There have been rumors that the attack may have been a hate crime. While that has not been ruled out, the L.A. County Sheriff's Department said they were not leaning toward that motive because there was nothing said that would be descriptive of a hate crime.
The motive is unknown.
Police said the suspects pulled up in a white van and said "Excuse me" to a group of about 10 people who had just dined at the Indian restaurant. When the group went over to see if the men needed assistance, the suspects sprayed fire retardant at them.
The suspects were last seen driving southbound on Pioneer Boulevard.
Anyone with information is urged to call the L.A. County Sheriff's Lakewood station (562) 623-3500.