RIYADH: Nineteen people, including 12 Pakistani nationals, have been arrested in Saudi Arabia following suicide attacks on Monday, including one near Islam’s second-holiest site in the city of Madina, the kingdom’s Interior Ministry said on Thursday. Seven people are believed to have been killed and two wounded in three separate attacks — in Madina, at a Shia mosque in Qatif, and in western Jeddah, the economic capital, not far from the US consulate. A 26-year-old…