LAFAYETTE — Four suspects in two home-invasion robberies that happened about a month apart have been arrested, and at least two of them are connected to robberies in other cities, authorities said.

The robberies in Lafayette took place on Nov. 26 and Oct. 31, according to the Lafayette Police Department. The other robberies tied to two of the suspects happened in Oakland and Benicia, authorities said.

The Fairfield Police Department SWAT team and Lafayette Police Department served Ramey arrest warrants, also known as pre-complaint warrants, and search warrants at a residence in the 500 block of Pacific Avenue in Fairfield on Thursday, authorities said in a statement. Investigators were there in connection with the robbery cases, and detained multiple persons, authorities said.

The two suspects initially arrested were identified as Joseph Wells, 22 and Adama Diop, 20, both of Fairfield. On Friday, the department said two more people had been taken into custody: Immanuel Wells, 24, of Vallejo, and Mayaebone Tanyao, 21, of Fairfield.

Authorities said the Wells men are cousins and that Joseph Wells and Tanyao have a child together.

All four were arrested at the Pacific Avenue home where authorities said Joseph Wells, Diop and Tanyao lived.

“The arrest of these home invasion robbery suspects is the result of good police work,” Contra Costa Sheriff David Livingston said in a statement. “It was a combination of following up on leads, a critical tip from a citizen who reported something suspicious, and teamwork among the law enforcement agencies involved.”

Investigators planned interviews with the suspects. All four suspects have been booked into the Martinez Detention Facility on charges that include: residential burglary, kidnapping, false imprisonment, assault with a deadly weapon, robbery, vehicle theft, and conspiracy.

According to a statement, Lafayette police and Contra Costa County Sheriff’s Office investigators worked on the case. Separately, the Oakland Police Department was already investigating a home-invasion robbery on Oct. 29 and a similar crime happened in Benicia on Nov. 10.

A second home-invasion robbery occurred in Lafayette on Nov. 26 in which a husband and wife were both restrained and suffered minor injuries. The agencies began coordinating their efforts once investigative leads were developed and similarities between the four cases were established, the release said.

In the Oakland robbery, a man in his 30s was abducted from in front of his home in the 5500 block of Golden Gate Avenue in the Upper Rockridge district about 11:31 p.m. Oct. 29 by two masked men, one armed with a gun. The victim was restrained from moving, speaking or seeing before he was driven to a nearby ATM and ordered to withdraw money, authorities said. Authorities believe a third person was also involved in the robbery.

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Three suspects broke into a Lafayette home, restrained residents, and stole their valuables During the search at the residence, Lafayette police seized guns and numerous items and property believed to be stolen during the home-invasion robberies, according to the release.

The Oct. 31 Lafayette home-invasion robbery occurred on the same night as a mass shooting at a Halloween party in Orinda, in which five people were killed and several others were injured by gunfire. Two Orinda police officers had been assisting Lafayette police at the time of the robbery and were in Oakland recovering the victims’ BMW, stolen by the suspects who fled with personal items and valuables.

The arrests come one day after a crowd of more than 120 people packed the Lafayette Veterans Memorial Center for a special meeting on recent crimes in Lafayette. At that meeting, Lafayette police Chief Ben Alldritt recounted the home-invasion robberies but declined to answer questions about the crimes, saying it was an active investigation.

Harry Harris and Angela Ruggiero contributed to this report.