At least 33 people were wounded on Monday in an explosion in a busy downtown area of Nairobi. Police said it was caused by an electrical malfunction, but the prime minister insisted the blast was deliberate. Al Qaeda’s wing in Somalia, Al-Shabab, had previously threatened such an attack. One woman who was injured claimed to have seen a “bearded man” leave a bag behind at one of the stops. The explosion occurred at one-story building on Moi Avenue, sending smoke through the street, located just blocks away from the site of the 1998 U.S. Embassy bombing.