By Pam Benson
U.S., Yemeni and other intelligence agencies broke up a plot to bomb a U.S. airliner around the anniversary of the raid that killed al Qaeda leader Osama bin Laden, a U.S. counterrrorism official said Monday, although a second U.S. counterrorism official said that the threat was not timed to coincide with the death of the al Qaeda leader.
The plot was discovered before it threatened any Americans, and no airliners were put at risk, the official said. A non-metallic explosive device similar to the one used in the failed attempt to bomb a Detroit-bound jet in 2009 was recovered, the official said. Both devices were associated with Ibrahim Hassan al Asiri, the official said.
And a Yemeni official told CNN that his government was made aware of a possible attack tied to the anniversary. The target was not specific, the official said, and the alert went out to the United States and other partners in the war on terror.
The White House said President Barack Obama was told about the plot in April, and the attempt "underscores the necessity of remaining vigilant against terrorism here and abroad."
CNN's Elise Labott and Jessica Yellin contributed to this report.