MOSCOW, Jan 14 - Kazakhstan on Wednesday urged the U.S. and Europe to help secure the transport of oil following drone attacks on tankers heading to a Black Sea terminal on the Russian coast which handles one percent of global supply.

Unidentified drones struck at least two oil tankers in the Black Sea on Tuesday, including one chartered by U.S. oil major Chevron, as they sailed toward a terminal on the Russian coast to load oil from Kazakhstan.