The papers focus on the killing of a 19-year-old university student.
The Daily Mail says Tom Grant died doing "the decent thing", after he intervened in a dispute on a train.
The Daily Mirror describes him as the hero of the 10:10 express. He was a young man, reports the Daily Telegraph, who was hoping to join the army.
The Times says there is "a palpable sense of shock" among the students, while the Independent talks of a British knife crime epidemic.
The fate of Deputy Prime Minister John Prescott is discussed by the papers, after he is pictured playing croquet.
The Guardian thinks he has become the butt of unhappiness with a government that is seen as "hollow" - intact on the outside, but directionless within.
According to the Mirror, Mr Prescott will face a grilling over his future when Prime Minister Tony Blair returns from holiday.
The Telegraph says Mr Prescott is losing the support of backbench MPs.
Britain's bloodiest month
A bloody weekend in Iraq is reflected on by the papers.
The Financial Times points out that Britain has just suffered its bloodiest month in the country.
The Times reprints an article written by journalist Kimberly Dozier, who was critically injured in a Baghdad attack which killed two of her crew.
"Going to Iraq is like being flung into a pot of boiling water," she wrote. She said it "took a while" for reporters to admit that they were targets.
The Morning Star quotes peace campaigners as saying that occupation of the country is fuelling the violence.
Breast cancer hopes
Several of Tuesday's front pages carry stories on a medical theme.
The Daily Express leads with a "new hope on breast cancer" - that fewer but larger doses of radiation can have more success than current programmes.
The Sun has a "world exclusive" interview with a white couple who gave birth to mixed race twins after a mix-up with their IVF treatment.
Meanwhile, the Guardian carries the story that a top judge says the prison service is "fatally flawed".