The explosives were planted Thursday outside the house of President Abdrabuh Mansur Hadi, the media arm of Al-Qaeda’s Yemen branch said in a statement posted on Twitter.
They were intended to be detonated when Ambassador Matthew Tueller left following a roughly hour-long visit to the house in the Yemeni capital Sanaa, it said.
There was no official confirmation of the failed plot. Yemen is a key US ally in the fight against Al-Qaeda, allowing Washington to conduct a longstanding drone war against the group on its territory.
The United States considers Al-Qaeda in the Arabian Peninsula (AQAP) to be the most dangerous arm of the jihadist organisation.