CHICAGO (CBS) — Chicago Police are investigating the death of a man in his 40s who was beaten by a group early Sunday morning on the South Side.

Authorities still have not identified the man.

Police say that about 3 a.m. Sunday, the man and a friend left another man’s home – and, while they were on the 7900 block of South Greenwood Avenue, they were approached by another man who asked to use the friend’s cell phone.

LISTEN: WBBM Newsradio’s Steve Miller reports

The friend said no – and then a fight started, police say, as other men – possibly as many as five – joined in.

At some point, the man with the cell phone ran for help and the man in his 40s was ultimately beaten to death.

A police spokesman says authorities are hoping security videos from businesses in the area will help in the investigation.

An autopsy is set for Monday.

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