A bomb exploded in a trash bin in downtown Port-of-Spain, on Monday, injuring 14 people, police said.
The commercial district was evacuated and the area checked for additional bombs, but none were located, Deputy Police Commissioner Glen Roach said.
"We have no idea of the kind of device used nor who is behind it," Roach added.
According to local media, a man was seen placing a package in the garbage bin shortly before the afternoon explosion at a busy intersection in the capital of the two-island Caribbean nation of Trinidad and Tobago. The site of the blast is two blocks from the national Parliament, which was meeting at the time.
