Complex sentence: They staged a protest outside the hospital heading to the Pearl Roundabout and at the same time another march was heading to the same location from King Faisal Highway; however security forces intervened, injuring some protesters and arresting 24.
Split into simpler sentences: They staged a protest outside the hospital heading to the Pearl Roundabout; meanwhile another march was heading to the same location from King Faisal Highway. Security forces intervened, injuring some protesters and arresting 24.