A man in his 20s is seriously injured after being shot in downtown Montreal early this morning.

It happened on Mackay Street, south of Ste-Catherine Street at around 3:45 a.m.

He was shot at least once and sustained injuries to his lower body.

"Paramedics on the scene managed to treat this man and brought him to the hospital," said Montreal police Const. André Leclerc.

"He was in a serious condition but he was conscious at the moment of his transport."

Leclerc says investigators are looking for witnesses or any information that would lead them to a suspect.

The shooting is the second in as many weeks in downtown Montreal.

Last week's shooting happened on Crescent Street. (Radio-Canada)

A 21-year-old man was shot near Crescent and Ste-Catherine streets early last Sunday morning.