Kenyan security forces have guarded the house of U.S. President Obama’s step-grandmother Sarah Hussein Obama in Kenya, after Al Qaeda threatened her life.

As Armenian News-NEWS.am reported earlier, Osama bin Laden, the Al Qaeda leader behind September 11 terror attack was killed in a firefight with U.S. forces in Pakistan on May 2.

Al Qaeda and its affiliates have issued threats and vowed to carry out revenge attacks after bin Laden’s death. U.S. authorities have warned their citizens abroad their life may be endangered.