UPDATE 6-Saudi Arabia says its oil tankers among those hit off UAE coast

DUBAI/LONDON, May 13 (Reuters) - Saudi Arabia said on Monday that two of its oil tankers were among those attacked off the coast of the United Arab Emirates and said it was an attempt to undermine the security of crude supplies amid tensions between the United States and Iran. The UAE said on Sunday that four commercial vessels were sabotaged near Fujairah emirate, one of the world's largest bunkering hubs lying just outside the Strait of Hormuz. The UAE had not given the nationalities or other details about the ownership of the four vessels.