Prosecutors filed four robbery counts against a Long Beach man following an investigation of crimes committed against local restaurants, police said.

Long Beach police also reported finding more than 50 firearms at the suspect’s residence. Additionally, officers arrested the man’s father on suspicion of violations of weapons and drug laws.

The robbery suspect, Randall Nick Young, 21, of Long Beach, was charged after police presented their case to the Los Angeles County District Attorney’s Office on Monday. As of early Tuesday, he was in custody at Los Angeles County Jail with bail set at $100,000.

Police arrested Young on June 25 after serving a search warrant at his home in the 3300 block of Roxanne Avenue.

The move followed the June 22 robbery of a restaurant in the 4300 block of E. Anaheim Street as well as the June 24 robbery of another eatery in the 600 block of Redondo Avenue. An anonymous tip led detectives to Young’s residence.

In both robberies, police allege Young, armed with a handgun, demanded money from restaurant cashiers. No one was hurt during either robbery, according to a Long Beach Police Department press release.

Long Beach police also arrested Young’s 48-year-old father, Martin Young. The elder Young was booked on suspicion of possession of firearms with narcotics, possession of prohibited assault weapons and possession of a controlled substance.

Prosecutors are still reviewing evidence to determine any charges that may be filed against the elder Young. He has made bail and is not in custody.

Anyone who may be able to provide additional information on the case to police is asked to call robbery detail Senior Lead Detective Don Collier at 562-570-5537.

People who would prefer to provide information anonymously may call 800-222-TIPS (8477), send a text message to TIPLA with the information to 274637 (CRIMES) or go online to www.lacrimestoppers.org.