FOG BLOG RUSSIA'S WAR WITH UKRAINE LOG: RUSSIA DEMANDED SURRENDER OF MARIUPOL, UKRAINE SAYS NO!

Ukraine refuses to surrender Mariupol as scope of human toll remains unclear...Airstrike hit art school sheltering about 400 civilians ahead of rejected proposal, Ukrainian officials say..........Russian and Ukrainian soldiers fighting block by block for control of Mariupol.

• Radiation monitors around Russian-seized Chornobyl nuclear site not working, Ukrainian officials say.

• At least 8 dead after shopping centre shelled in Kyiv; mayor announces curfew.

• Russian missile strike hits military training centre in Rivne region of western Ukraine.

As Mariupol's defenders held out Monday against Russian demands that they surrender, the number of bodies in the rubble of the bombarded and encircled Ukrainian city remained shrouded in uncertainty, the full extent of the horror not yet known.

With communications crippled, movement restricted and many residents in hiding, the fate of those inside an art school flattened on Sunday and a theatre that was blown apart four days earlier was unclear.

More than 1,300 people were believed to be sheltering in the theatre, and 400 were estimated to have been in the art school..