Boris Johnson is considering a lightning trip to Kyiv to show support for Ukraine's battle against Vladimir Putin.
The Prime Minister has asked officials to examine the practicality and value of the trip to the Ukrainian capital for talks with president Volodymyr Zelensky.
Security officials are said to be 'having kittens' at the prospect of the PM travelling to a war zone; from which ten million have fled, UN High Commissioner Filippo Grandi said on Sunday.
But a Whitehall source said Mr Johnson 'wants to go' if it can be made to work.
The source added: 'If you set aside the security concerns, which are considerable, the question is whether there is anything additional you could achieve by visiting in person, or whether it would just be a show of solidarity, and whether that is a sufficient goal in itself.'
Prime Minister Boris Johnson has asked officials to examine the practicality and value of a trip to Kyiv
Rescuers work at a site of a shopping mall damaged by an airstrike, as Russia's attack on Ukraine continues, in Kyiv, Ukraine today
But the situation last night in Kyiv showed how difficult it would be to ensure the Prime Minister's safety if he does visit.
Mayor Vitali Klitschko shared pictures of what appeared to be an explosion in the distance in the city's Podil district.
In a tweet he reported claims of several explosions, 'in particular, according to information at the moment, some houses and in one of the shopping centres'.
Klitschko added that 'rescuers, medics and police are already in place' and reported 'at this time - one victim'.
It is unclear if he referred to a fatality or injury.