NEW : Police tighten security after violence Thursday and Friday . Militants sprayed bullets at cars before Friday prayers on Eid , killing 10 people . ( CNN ) -- The attack comes as the government is trying to quell a wave of protests against President Mohamed Morsi's ouster last week by Egypt's military rulers. A bomb at a funeral Thursday killed 30 people .
NEW : Police tighten security after violence Thursday and Friday . Militants sprayed bullets at cars before Friday prayers on Eid , killing 10 people . The attack comes as the government is trying to quell a wave of protests against President Mohamed Morsi's ouster last week by Egypt's military rulers. A bomb at a funeral Thursday killed 30 people .