In the first incident, Morris Emmanuel was walking along Sapodilla Trace, Laventille, when he was shot by a lone gunman.
Emmanuel was pronounced dead at the scene.
Police have not yet established a motive for his killing.
In the second incident, Howell Sargent from Tunapuna was changing a tire on his car when he was approach and shot by a lone gun.
Police say the circumstances surrounding his killing are unclear at this time, and a motive has not been given.
Investigations are continuing.