A murder suspect who has been the subject of largest manhunt in Northern California in decades fired at a group of sheriff's deputies Thursday, authorities said.

The Alameda County deputies taking part in the search in the redwood forest where the man has been at large for more than a month weren't hit and fired about 10 shots in response, Mendocino County Sheriff Tom Allman said at a Thursday night news conference.

Aaron Bassler is suspected of killing a city councilman on Aug. 27 and one other person several weeks before. The 35-year-old is thought to be hiding out in the redwoods outside of Fort Bragg and is believed to have broken into several cabins to steal food and at least two other weapons.

Allman did not know how many shots Bassler fired, or if he had been wounded in the exchange. More law enforcement officers were being flown into the area to join the 40 officers involved in the search, he said.

"There is no plan to end this operation until we have a resolution," he said.

Fort Bragg City Councilman Jere Melo, who also worked as a security contractor, and a co-worker at a private timber company confronted Bassler while investigating reports of an illegal marijuana farm outside of town.

Police said Bassler was cultivating some 400 poppy plants and was holed up in a makeshift bunker when he fired on the 69-year-old Melo and the co-worker, who escaped and called for help.

Bassler is also being sought in the fatal shooting of Matthew Coleman of the Mendocino County Land Trust. The former Fish and Game Department employee was found dead next to his car on Aug. 11 up the coast from Fort Bragg.

Both men were highly respected for their love of the land and their community work. The 7,000 residents of Fort Bragg have been on edge while the manhunt by dozens of local and federal agents has enveloped their coastal fishing and lumber community.

Bassler said he believes his son suffers from schizophrenia and for years has talked about aliens and spaceships, while crafting Chinese military stars and drawings of weapons systems. His son was arrested in 2009 after he was accused of flinging some of those red stars over the fence of the Chinese consulate in San Francisco, but was released after authorities determined he was not an immediate threat to himself or others. Bassler was arrested again on DUI charges in February after he allegedly rammed his truck into a school tennis court. He lost his license, and shortly afterward, lost his place to live.

"He lost his truck, then he lost his place to live; all his links to the real world," his father said in an interview last week.

Earlier this week, authorities released a photo of Bassler vandalizing a vacation cabin while holding a high-caliber rifle. On Wednesday, they confirmed his fingerprints linked him to another burglary at a cabin.

James Bassler said he had tried for years to get county authorities to have his son put into a mental health program, but that his letters and calls had gone unanswered due to privacy laws that protect his son.