Marinwood man beaten with baseball bat in home invasion robbery

In this file photo, crime scene tape is wrapped around a pole on Russian Hill. In this file photo, crime scene tape is wrapped around a pole on Russian Hill. Photo: Bill Hutchinson / Photo: Bill Hutchinson / Image 1 of / 1 Caption Close Marinwood man beaten with baseball bat in home invasion robbery 1 / 1 Back to Gallery

A man was beaten with a baseball bat while his family was held at gunpoint after three masked intruders entered their Marin County residence early Tuesday — the latest in a string of recent violent home invasions throughout the Bay Area.

Officers received reports of the home invasion robbery shortly after midnight in a suburban neighborhood of Marinwood.

Three men wearing masks entered the home on Mount Muir Court through an unlocked sliding door. One of the robbers brandished a gun and forced the family, including two 9-year-old brothers, out of their bedrooms, said Lt. Scott Anderson of the Marin County Sheriff’s Department.

The father of the children was struck with a baseball bat after not being able to open a safe, Anderson said, adding that his injuries didn’t require medical attention.

The family was shoved into a bathroom as the assailants ransacked the home, stealing an undisclosed amount of cash, electronics and jewelry, Anderson said.

No suspects have been identified.

The incident is the latest in what appears to be an increase in home invasion robberies throughout the Bay Area.

On Sept. 15, two men and a woman forced their way into a home in San Francisco’s Mission District and threatened a 21-year-old with a gun before stealing his cash.

On Sept. 21, armed, masked men stole a large amount of money and property after holding a family at gunpoint in Pacifica.

No arrests were made in either of those robberies.

On Sept. 27, Orinda school board member Carol Brown and her husband, Tom Spalding, were hurt in a violent robbery outside their home in Orinda that left Brown with non-life-threatening gunshot wounds. Six people were arrested Oct. 4 in the robbery and linked to a series of other robberies that took place in the East Bay, Orinda Police Chief Mark Nagel said.

On Oct. 8, a robber broke into the San Jose home of 88-year-old Flo Douglas and brutally beat her before stealing her car. Douglas later died from her injuries. Police arrested Zachary Cuen, 19, of San Jose in the home invasion, and Santa Clara County prosecutors charged him with murder.

Sarah Ravani is a San Francisco Chronicle staff writer. Email: sravani@sfchronicle.com Twitter: @SarRavani