1. The chemical pollution was caused by a collision involving two oil tankers Sunday afternoon.
2. During the closure thousands of oil tankers and supply vehicles became stranded at different points between the port city of Karachi and Peshawar.
3. oil tankers
3. Rauf said that he heard the explosion and saw at least three oil tankers, two container trucks and two dump trucks on fire.
4. It would require the destruction of major oil refineries, pipelines and the interdiction of tankers at sea.
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5. Militants frequently attacked oil tankers and trucks bringing goods from Pakistan's port city of Karachi for forces battling Taliban in Afghanistan.
6. Tankers carrying Middle East oil through the Suez Canal must pass first through the Gulf of Aden.
7. oil tankers
7. Traffic on major roads has been limited, with oil tankers still being barred from entering downtown.
8. The bridge would need to be that large to allow for the passage of the dozens of oil tankers that use the strait each day.
9. Also, more cargo vessels and oil tankers now have contingents of private armed security guards.
10. The attackers fled the scene after they opened fire at the convoy and set the oil tankers on fire.