A man was shot on a light-rail platform in south Minneapolis early Friday, authorities said.

The victim was taken to Hennepin County Medical Center, where he was in critical but stable condition, said Metro Transit spokesman Drew Kerr.

Police went to the Franklin Avenue light-rail station around 1:35 a.m. after the victim used an emergency call button to summon help, Kerr said.

Blue Line trains were not running at the time. Trains were running normal Friday morning, Kerr said.

No one had been arrested as of 7 a.m. Friday and police continued to investigate.