The Guardian leads on the Sri Lankan government's admission that it received warnings two weeks ago that suicide bombers from a radical Islamist group were planning to target churches.
But the paper says it's unclear whether there's been new information since the attacks, firmly establishing that the group National Thowheed Jamaath (NTJ) carried them out.
A number of experts and Sri Lankan ministers are quoted across the papers suggesting the group would have had help from abroad.
But US intelligence sources tell the Times that the NTJ may have been trying to curry favour with the Islamic State group, by imitating its methods in a large-scale attack.
Prime Minister Theresa May will return from the Easter break facing a "triple assault" on her leadership, according to the Daily Express.
The paper says she's likely to be confronted by Conservative MPs demanding she set a resignation date, increasingly angry cabinet members, and an unprecedented, albeit non-binding, confidence vote among grassroots party members.
Several papers report that if Mrs May refuses to set a departure date the backbench 1922 committee might axe the the rule preventing more than one confidence vote being held in a 12-month period.
The Health Secretary Matt Hancock tells the Daily Telegraph that he's determined to end the injustice of NHS staff having to choose between the job they love and speaking the truth to keep patients safe.
The Telegraph says Mr Hancock's pledge to ban non-disclosure agreements echoes a similar, unfulfilled vow made by his predecessor, Jeremy Hunt.
The paper's leader column calls on Mr Hancock to do more than make empty promises.
The Daily Mail says some of Britain's biggest high street stores have been "secretly filming" shoppers, in a bid to make them spend more.
Shops including Tesco, Boots and Sainsbury's are said to have used a little-known behavioural analysis agency, which claims it can use the footage to manipulate consumers' emotions.
The firm - called SBXL - says adequate signage has been in place and consent sought from shoppers.
But the Information Commissioner's Office tells the Mail it's going to investigate the claims to check for breaches of data protection laws.
The Daily Mirror reports that tens of thousands of patients are facing a wait of up to 16 months to see an NHS dentist.
In Devon and Cornwall, 48,000 people are said to be on waiting lists with an average length of 477 days each - leading some to turn up at hospital desperate to have painful teeth removed.
The British Dental Association tells the Mirror that underfunding by the government is to blame.
United in mourning
The Sun is among the papers to focus on families devastated by the bombings in Sri Lanka.
According to the Times, a British man at a hotel in Colombo was forced to decide which of his injured children to bring to safety, only for them both to die.
Matthew Linsey tells the paper they were caught up in one explosion and then a second as they fled.
With the headline "Murdered at the Breakfast Table", the Daily Express reports on Ben Nicholson, who lost his wife and two children.
The Daily Mirror says the world is "united in mourning" for the victims.