Authorities are investigating the second homicide in Boston this year, the early morning fatal shooting of a man in South Boston today, Boston police said.

Police said they rushed to 335 West Second St. around 2:51 a.m. and found the victim lying on the ground.

The man was rushed to Tufts Medical Center, where he was later pronounced dead.

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Police did not release the man’s name.

No arrests have been made.