CAIRO, Oct 4 (Reuters) - Four suspected Islamic State-linked militants and one Sudanese security forces member were killed during clashes in a raid in Sudan"s capital Khartoum on Monday, state news agency SUNA reported. Sudanese security forces clashed with militants in southern Khartoum on Monday, state TV and witnesses said, days after a raid on what officials said was an Islamic State-linked cell in the same area.