The Metropolitan Police's admission that a man fatally shot at Stockwell Tube station was unconnected to terror inquiries dominates the front pages.
The Sunday Express says the death must be blamed on the terrorists and there should be no Met witch hunts.
The Sunday Telegraph says the inquiry into the shooting should take into account the volatile climate in which police are working.
In the News of the World, Sir John Stevens says his heart goes out to the officers involved.
The Mail on Sunday says hundreds of armed officers are now secretly mingling with commuters on transport systems with "shoot to kill" orders.
It says the move means the days of the unarmed English bobby are over.
The Sunday Mirror claims retired security service officers are being asked to return to work to help monitor up to 2,000 suspects across the UK.
The Sunday Telegraph says the Met police has seen a surge in applications to join it since 7 July.
Many papers see a connection between the recent London bombings and the blasts in the Egyptian resort Sharm al-Sheikh early on Saturday.
The Sunday Mirror warns that we are all now on the frontline of the "war on terror", whether at work or abroad.
The People calls for international solidarity to face the threat and criticises Inter Milan's decision to cancel a tour of England.
The Observer simply laments the "city of peace" becoming soaked with blood.
Away from terrorist threats, many papers provide some light relief.
The Independent reports that a new book claims Germans invented TV, light bulbs - even tea bags. The book was roundly ridiculed in the German media.
The Mail on Sunday says Gordon Brown told Prince Charles royal tax breaks would not change without Charles' approval - an unlikely ally, it notes.
The Observer says the mystery of Tony Blair's shine is solved. Almost £2,000 of make-up maintains the glow, it says.