A group of armed robbers invaded a Sebastopol-area home early Saturday morning and fired shots as they fled with an undisclosed amount of cash, drugs and personal property, according to the Sonoma County Sheriff’s Office.

The case appears to involve marijuana, a Sheriff’s Office spokesman said, making it the latest in a series of violent, pot-related home-invasion robberies in Sonoma County this year. A February break-in on Santa Rosa’s southwestern outskirts ended with a homeowner shot dead and his relatives tied up.

Saturday’s robbery was reported sometime before 2:15 a.m. in the area of Big Plum Drive and Bing Tree Way, south of Sebastopol near Bloomfield and Lone Pine roads.

A man placed a 911 call reporting he had been robbed by four men and that gunshots had been fired before the robbers fled in two vehicles, described as a black sedan and a white sedan. A detailed description of the suspects was not provided.

In some past home-invasion break-ins, groups of robbers came from out of state and used rental cars to get around, said Sheriff’s Sgt. Spencer Crum. But investigators couldn’t yet say if Saturday’s robbery followed that pattern because they have yet to identify those involved.

“We don’t know who it is,” Crum said of the group of robbers.

Investigators Saturday were releasing few details.

Crum said the victim claimed the robbers were there to steal marijuana. “It’s undetermined if they got any or not,” he added.

Investigators aren’t saying exactly what types of drugs were taken from the home or why the robbers fired shots as they fled.

No one was injured, he said.

Deputies responded to the predawn 911 call, and detectives from the Violent Crimes Unit continued to investigate Saturday.

The break-in marked the eighth known time this year where robbers have entered a home in the county in search of marijuana. Law enforcement has dealt with five separate cases, including two where the robbers broke into more than one house on the same day.

Many of the suspects arrested in connection with such robberies have come from the East Coast, where authorities say they are seeking to take advantage of the black market available for California-grown cannabis.

You can reach Staff Writer Robert Digitale at 707-521-5285 or robert.digitale@pressdemocrat.com.