By Alexander Cornwell, Trevor Hunnicutt and Yomna Ehab TEL AVIV/WASHINGTON, March 31 (Reuters) - Iran attacked and set ablaze a fully loaded crude oil tanker off Dubai on early on Tuesday, after President Donald Trump warned the United States would obliterate Iran's energy plants and oil wells if it does not open the Strait of Hormuz.

Israel’s military said Tuesday that four additional soldiers were killed and two were wounded during combat in southern Lebanon.

The tanker was fully loaded, the KPC said, warning of the possibility of an oil spill, according to KUNA.

A Russian tanker carrying oil to Cuba has entered the waters off the Communist-run island, Russia's Interfax news agency reports.

The White House said Monday (March 30) U.S. sanctions policy toward Cuba remains unchanged, even as a sanctioned Russian oil tanker was allowed to deliver fuel to the island on humanitarian grounds.

After Washington launched the oil blockade, President Miguel Diaz-Canel imposed emergency measures to conserve fuel, including strict rationing of gasoline.