Tucson Police are in a standoff early Monday morning with a man who barricaded himself inside a house on East Drachman Street near North Tyndall Avenue.

Police received a call from a neighbor at about 9:45 p.m. telling them that a man was laying in the yard outside the house. When officers arrived, they found the man dead, said Sgt. Diana Lopez, a Tucson Police Department spokeswoman.

Another man inside the house refused to come out when questioned by police and barricaded himself inside. The SWAT team and hostage negotiators were called to the scene.

As of 2:00 a.m., the man has not surrendered.

Few other details were immediately available. Police are still investigating how the man in the yard died.

Both men were related, Lopez said, but police have not yet released the specific relationship.

Lopez could not say whether or not the man inside the house was armed.

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