The row about Boris Johnson's Brexit comments and the critical response from the UK Statistics Authority dominates most news and comment pages.
Helen Lewis, of the New Statesman, describes the letter from the chief of the statistics body, Sir David Norgrove, as "a rare direct criticism of a senior politician by the non-partisan Statistics Authority", signalling "quite how irritating statisticians find the continued misuse of the £350m figure".
The Spectator's columnist, Steerpike, questions why the supposedly impartial regulator is joining what he terms the "Boris-bashing". He writes: "surely he has better things to do than send angry tweets to the foreign secretary?"
The Financial Times points out that "challenging the misuse of public statistics" is among the watchdog's formal objectives.
Several papers publish an image of what is thought to be the man who planted a bomb on the London Underground on Friday. He is shown carrying a carrier bag similar to the one used to contain the device.
The Times reports that the 18-year-old man arrested at Dover was detained because he was wearing a "distinctive red hat".
Neighbours of the foster parents who cared for him tell the Daily Telegraph the couple had contacted the authorities because they were struggling to cope.
One man tells the Daily Mirror how they had only recently returned to fostering and had agreed to take him in because they had been told he was much younger.
The Daily Express leads with a report that ministers are considering proposals to withhold compensation for prisoners claiming human rights abuses, so their victims can be offered a share of the payouts.
The idea has been put forward by Conservative backbencher David Davies who says "greedy human rights lawyers" must be prevented from making "easy cash".
The Daily Telegraph reports on a church bell in Coniston village in the Lake District that is to be silenced overnight for the first time in a century.
Visitors staying near St Andrew's Parish Church - the last resting place of the Victorian critic John Ruskin - are said to have complained about disturbed sleep. Locals denounce the critics as "offcomers" with a "sense of entitlement".