A man was found dead in a busy SEPTA concourse in Center City Tuesday night, according to police.

The 37-year-old man was pronounced dead inside the concourse near SEPTA's 11th Street Market-Frankford Line Station at 7:01 p.m.

Police initially told NBC10 the man was beaten by a group of men prior to his death. After further investigation, they determined however that the man likely died from an overdose and a group of men later discovered his body.

Police have not yet revealed the man's identity or determined an exact cause of death. They say he appears to be a homeless man however and there were no signs of trauma to his body.

This story is developing. Check back for updates.