The death toll from fighting between Syrian government forces and civilians rose Sunday, a day after the United Nations Security Council failed to approve a plan seeking to halt the violence.

Demonstrators clashed with police outside the interior ministry in Cairo on Sunday as anger mounts over a deadly stampede at a soccer match that killed dozens last week.

As international leaders express outrage over mass killings in Syria -- and lament the inability to pass a U.N. Security Council resolution denouncing the Syrian regime -- questions linger about the two countries behind the impasse.