EMERYVILLE, Calif. -- Police in Emeryville were investigating yet another armed takeover robbery of a restaurant late Wednesday at an East Bay establishment near San Pablo Avenue, the latest in a growing string of similarly styled hold-ups that have been plaguing the area.

The establishment -- Restaurant Furenzu -- is located at 39th and Adeline streets near MacArthur Boulevard just across the Oakland city line.

Oakland police are putting more officers on the street and using undercover officers as they try to crack the recent rash of "takeover" robberies in the city.

A customer told KTVU Channel 2 that two men armed with a gun entered the restaurant just before 9 p.m. and demanded cash and valuables from the manager and about 15 people eating dinner. They then reportedly fled on foot heading south on Adeline Street. No one was injured during the incident.

The suspects were described as black men in their 20s. The customer also said that the men cased the restaurant prior to returning with a firearm drawn to rob the manager and patrons.

Berkeley police are also reporting that armed robbers wearing ski masks held up two businesses in less than a week. But officials there don't know if the cases are related.

So far, no one has been hurt in any of the robberies.

In the Oakland robberies, police say the robbers have been getting away with only small amounts of cash.

But police in Berkeley say during one robbery last week, four men wearing ski masks robbed a safe of $2,500.

Since the end of March, there have been seven armed robberies of staff and patrons at restaurants in neighboring Oakland. Police would not indicate as to whether they thought this latest crime could be linked to the earlier takeover-style robberies.

Oakland police are offering a $7,500 reward for information leading to the arrest of the men behind the hold-ups.