* Death toll climbs to 13, hundreds wounded * Police, troops briefly chase protesters out of Tahrir * Clinton "deeply concerned", Ban "highly alarmed" * Army general blames unrest on "evil forces"
CAIRO, Dec 19 (Reuters) - Egyptian security forces fought opponents of army rule in Cairo for a fourth day on Monday and the United States, worried by the violence, urged the generals to respect human rights.
Medical sources said the death toll had risen to 13 since Friday. Hundreds have been wounded and scores detained.
Police and soldiers using batons and teargas drove stone-throwing protesters out of Cairo's Tahrir Square, hub of the uprising that ousted Hosni Mubarak in February, overnight.
Hundreds had returned to the square by morning after security forces retreated behind barricades in streets leading to parliament, the cabinet office and the Interior Ministry.
