Exclusive: Miami Beach Surveillance Video Shows 7-Eleven Robber

MIAMI BEACH (CBSMiami) -- Miami Beach Police say dramatic new surveillance video shows an armed criminal jumping over a counter and robbing a 7-Eleven store and they say that same person may have also robbed another 7-Eleven store in North Miami earlier in the week.

The tape obtained exclusively by CBS4's Peter D'Oench shows the suspect entering the 7-Eleven store on Alton Road near 14th Street at 4:18 on August 4. The suspect is seen jumping over a counter and demanding money and then removing a drawer and stealing $300 in cash. The video also shows him jumping over the counter on the way out.

"He is armed with a hammer and he jumps over the counter and demands money," said Officer Ernesto Rodriguez, spokesman for Miami Beach Police.

"He screams at the clerk, 'Where is the cash?' She opens the cash drawer and gives him cash."

He said that nearby an empty cash drawer was discovered along with an empty bag used in the crime.

Rodriguez said his detectives are working closely with detectives in North Miami because the same man may have robbed another 7-Eleven store at 118th Street and Biscayne Boulevard early in the morning on Tuesday August 6.

"Everything about this alarms us," said Rodriguez. "It's a troubling case early in the morning involving a female clerk. Fortunately, she was not harmed but she very easily could have been."

The video shows the female clerk with a very worried and stunned look on her face after the man jumps over the counter.

"This is a very dangerous man," said Rodriguez. "We don't know what he is capable of and that is what makes this extremely imperative that this dangerous man be apprehended. We are looking at a man who is 6 feet tall and 150 to 170 pounds and he came in to this location wearing a grey t-shirt and black pants and red sneakers and most important he was wearing a ski mask."

In North Miami, police say the suspect entered the store and said to the clerk, "Where is the money?" He is also seen on surveillance video jumping over the counter and ordering the clerk to open the cash register. He grabs the tray and steals $50 in cash and flees on foot. Police said he had a black firearm.

"This man goes in to this store wearing those red sneakers and he is armed and dangerous and is a threat to those he comes in contact with. We would like to stop this criminal before he goes further and assaults another clerk or anyone else," said Detective Lashondra Jones.

Rodriguez said anyone who can help police find this suspect should call Miami-Dade Crime Stoppers at (305) 471-TIPS (8477).

There is a reward of up to $1,000 and callers will remain anonymous.

It is not known if this suspect has struck other 7-Eleven stores in South Florida.

"We would like the community's help in finding this dangerous man and getting him off the street," said Rodriguez.