At least 12 Kurds have been killed in northern Syria, in the latest in a series of clashes with police that began last Friday. Several people were shot to death in northeastern Syria on Tuesday, when security forces fired at Kurdish demonstrators. Hundreds had gathered to mark the anniversary of the devastating chemical attacks that Saddam Hussein launched against Kurds in northern Iraq 16 years ago. The deaths followed several days of violence between Kurds and Syrian police, which began when fighting broke out between Arabs and Kurds at a football game last week. At least a dozen people were...