Four people have died after a shooter opened fire at two homes in Alabama, authorities said. Daniel Watson is accused of fatally shooting two people in a Birmingham house before killing two more in a nearby suburb, according to police.

Around midnight, St Claire County police officers responded to a home in Ragland, a Birmingham suburb, where they found a woman dead in the driveway and a man suffering from a gunshot wound inside, as per the statement from the sheriff’s office. The man was airlifted to a hospital, where he died. The victims were identified by the sheriff’s office as Amber Manning, 37, and Timothy Davidson, 62.

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Who is Daniel Watson?

Daniel Watson was arrested by police in St Claire County at around 6 am. He is 28 years old and lives in Pell City. He allegedly admitted to the arresting officer that he had also shot two people in Birmingham, reported ABC News.

Deputies responded to a Birmingham house reportedly described by Watson around 8 am local time Tuesday. Officers found a man and woman dead from apparent gunshot wounds inside, police said.

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“We believe the suspect shot two victims in Birmingham, before traveling into St. Clair County and shooting two additional victims in their jurisdiction,” Truman Fitzgerald, a spokesperson for the Birmingham Police Department said in a statement.

According to Fitzgerald, authorities have not yet determined a motive for the killings.

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“We do believe the suspect knows at least some of the victims,” said Fitzgerald. He did not identify the Birmingham shooting victims.

Watson is being kept in custody without bond by the St Clair County Sheriff’s Office on charges of capital murder and murder with a gun. He is also being detained for the Birmingham homicides, the sheriff’s office said in a statement.

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Watson is likely to face capital murder charges in Jefferson County, which includes Birmingham, according to Fitzgerald. However, it is unclear if the suspect has an attorney who can speak on his behalf.