UPDATE 1-Supporters of Saudi women activists detained, including two U.S. citizens -sources

Saudi Arabia has arrested eight people, including two dual U.S.-Saudi citizens, in an apparent crackdown on supporters of women activists whose trial has drawn Western condemnation, an associate and a rights group said on Friday. The U.S. nationals are journalist Salah al-Haidar, whose mother Aziza al-Yousef is among those on trial, and Bader al-Ibrahim, a doctor and author of a book about Shi’ite Muslim politics, the associate and London-based Saudi rights group ALQST said. The Saudi government communications office and the U.S. Embassy in Riyadh did not immediately respond to requests for comment.