The bombing of a Shiite mosque killed at least 19 people. The claim of responsibility is a first for the extremist group involving an attack inside the kingdom.
Authorities believe the attack in the northern city of Kano was the work of Boko Haram militants, although the group did not immediately claim responsibility.
The Taliban is claiming credit for the attack on a military convoy traveling near the U.S. Embassy that also wounded nearly 20 people, including more than a dozen civilians.