In Egypt, authorities have tightened security around the churches keeping in view the Coptic Christians celebrations set to take place tomorrow. The measures have been taken after a New Year's Day bombing in front of a church killed 21 people. Colonel Alla Mahmoud of the interior ministry said that Police has planned a large-scale security operation for tonight to protect Egypt's Coptic Christians and their churches. Meanwhile Egyptian authorities have released a sketch of a man suspected for the attack.