One of the End-Time "Signs of Qiyama" is that the Kaaba in Mecca will be destroyed. ISIS has actually said in its magazine that they want to be the ones to do it.
The second bombing took place near dusk outside a Shia mosque in the mainly Shia eastern city of Qatif.
A resident told the Reuters news agency that there were believed to be no casualties apart from the bomber, as worshippers had already left to break their daylight Ramadan fasts.
However, the interior ministry spokesman said the remains of three people had been found and were being identified, without providing any details.
Not long afterwards, another bomber struck near the Prophet's Mosque in Medina where thousands of worshippers had gathered for the Maghrib prayers.
http://www.thedailystar.net/world/saudi-king-pledges-iron-hand-medina-attackers-1250743
Saudi will search for “foreigners”, but this:
Twin brothers in Saudi Arabia allegedly killed their mother by stabbing her repeatedly after she attempted to stop them joining Isis.
The country’s interior ministry said Khaled and Saleh al-Oraini, both 20, had been arrested on suspicion of stabbing their 67-year-old mother, Haila, in the family home in capital Riyadh.
They also stand accused of attacking their 73-year-old father and 22-year-brother, who both remain in hospital in critical condition.
Haila al-Oraini died of her injuries at the scene. She had objected to her sons joining jihadists in Syria.
http://www.independent.co.uk/news/world/middle-east/saudi-arabia-isis-twin-brothers-stabbed-mother-death-stop-joining-jihadist-islamist-a7122266.html
and this
While measuring public opinion in Saudi Arabia is difficult, there are indications that terrorist groups may have more support than Saudi officials acknowledge, according to a survey last year by the Tabah Foundation, a research group in the United Arab Emirates.
While the majority of 831 Saudis ages 15 to 34 surveyed called Al Qaeda and the Islamic State “a complete perversion of Islam,” the rest had more complicated views.
Twenty-eight percent said the groups were “mostly wrong” but sometimes “raise and discuss issues that I agree with them on.” Five percent said that the groups were “mostly right” but that they disagreed with some of their actions. And 10 percent said they were “not a perversion at all.” The survey had a margin of error of four percentage points.
http://www.nytimes.com/2016/07/07/world/middleeast/saudi-arabia-isis-al-qaeda-jihadists.html
Indicates that the Saudi society has a problem at home.