Newspaper headlines: St Petersburg blast and Gibraltar row
Many of the papers focus on yesterday's explosion on the St Petersburg Metro.
The Daily Mirror has a photograph of the train with the side of the carriage mangled by one of the blasts and bodies lying on the platform next to it.
In its leader, the paper argues that President Putin's violent oppression in parts of Russia, and "indiscriminate" airstrikes in Syria, have fuelled extremism.
But it goes on to say that it hopes the Kremlin will not use the attack as an excuse to "clamp down on democratic opponents".
The Sun responds to the continuing controversy about the role Gibraltar might play in Brexit negotiations with the front page headline: "Up Yours Senors!" - a self-referential pun based on the paper's 1990 splash aimed at then-European Commission President Jacques Delors.
It is launching a campaign to keep the territory British and includes a free "Hands off our Rock" poster, which also has the message in Spanish - "Nuestra roca, so se toca".
The Guardian suggests that Foreign Secretary Boris Johnson will tell his German counterpart on Tuesday that Britain won't use defence and security issues for leverage in the Brexit talks, as long as Gibraltar isn't used by the European Union as a bargaining chip.
The Financial Times concludes that, even though the row is unlikely to scupper negotiations, it is a reminder of how difficult they are going to be.
The lead in the Daily Telegraph is a story about the Church of England's anger at the National Trust for leaving the word "Easter" out of publicity for its annual egg hunt.
A spokesman for the trust insists the organisation is "in no way downplaying the significance of Easter", but that chocolate firm Cadbury - which is sponsoring the event - is responsible for the branding.
Cadbury tells the Telegraph that it wants to appeal to "people from all faiths".
But the Archbishop of York, John Sentamu, is quoted saying that its decision is tantamount to "spitting on the grave" of the firm's founder, John Cadbury, because he was a devout Quaker.
The Daily Mail believes questions remain unanswered about the threat made by Sunderland football manager David Moyes that he would slap a BBC radio reporter, because she had asked him an awkward question.
The paper wants to know why, when the incident happened two weeks ago, it has taken until now for it to come out.
The Mail says it is especially perplexing because four broadcasters had access to the recording of what happened, but none of them chose to break the story.
The headline in the Daily Express is: "FA to quiz Moyes as he says sorry for his slap threat".
The grammar police
The Grammar Vigilante - a man from Bristol who corrects bad punctuation in signposts - wins the support of many of the papers.
The columnist in the i, Simon Kellner, describes him as "very much a man after my own heart".
The Times says he is a hero, stating in its leader column that "accurate punctuation begets clarity, and without clarity, there is only confusion".
The Daily Telegraph's cartoonist, Matt, depicts a policeman setting up a sign which says "beware - pedants operate in these streets". He is looking concerned because of an unnecessary apostrophe.