RIYADH, Saudi Arabia (AP) — A suicide bomber blew himself up near the Grand Mosque in Mecca as police disrupted a plot to target the holiest site in Islam just as the fasting month of Ramadan ends, Saudi security forces said Saturday. [...] police said they engaged in a shootout at a three-story house with a suicide bomber, who blew himself up and caused the building to collapse. Saudi state television aired footage after the raid Friday near the Grand Mosque, showing police and rescue personnel running through the neighborhood's narrow streets. Neither group immediately claimed involvement, though IS sympathizers online have urged more attacks as an offensive in Iraq slowly squeezes the extremists out of Mosul and their de facto capital of Raqqa in Syria comes under daily bombing from a U.S.-led coalition. [...] Saudi Arabia and other Arab countries have cut diplomatic ties to neighboring Qatar and are trying to isolate the energy-rich country over its alleged support of militants and ties to Iran.