The Bahraini government has arrested a number of opposition activists and political figures following a deadly crackdown on pro-democracy protests nationwide. On Wednesday, at least six people were killed and more than 1,000 wounded after state forces attacked demonstrators in the capital Manama. The crackdown spread throughout the country as Bahraini authorities imposed a 12-hour curfew and clamped down on travel. Witnesses reported helicopters firing on Shiite homes and doctors being attacked while treating the wounded. Government forces reportedly took over Bahrain’s largest hospital and prevented doctors from treating the wounded. Saudi Arabia and the United Arab Emirates have deployed hundreds of troops into Bahrain to protect the regime, a key U.S. government ally in the Middle East. On Wednesday, President Obama urged both Bahrain and Saudi Arabia to exercise “maximum restraint” but refused to condemn the assault on protesters.