Russia's emergencies ministry said the MI-8 went down at 10:20 local time.
All those on board were killed.
The helicopter was reportedly taking workers to an oil station.
A criminal investigation is underway.
Initial assessments have suggested that the aircraft's blades struck cargo being carried by another helicopter just after take-off.
The second helicopter was able to land safely.
The Russian Transport Ministry said the incident happened in "normal" weather conditions.
The Port Authority says the T&T Express was forced to turn back because of a problem with the hydraulics for the steering system.
The Port says the boat will sail again at 8pm tonight.
It is apologising for the problems passengers experienced today in the following statement.
"The Authority wishes to advise the travelling public that necessary maintenance works are continuing on the T&T Express and T&T Spirit.
The Ministry of Health is advising that effective March 22nd, 2017, persons travelling into Trinidad and Tobago from the following six (6) countries are required to present proof of vaccination against Yellow Fever through a valid International Certificate of Vaccination.
The countries are:
5. The Plurinational State of Bolivia