In Britain, many people remain unaccounted for following the deadly fire at a west London block of flats that killed 12 people on Wednesday. <br/><br/>Police have warned that the number of deaths is expected to rise. <br/><br/>London Fire Brigade chief on Thursday said firefighters have not been able to conduct a comprehensive search of the 24-storey block of flats because it is not safe for them to walk to the edges of the building. <br/><br/>About 600 people were believed to have been inside the Grenfell Tower on the Lancaster West Estate in Latimer Road when the blaze ripped through it. <br/><br/>Hospitals treated 74 people, of whom 18 remain in a critical condition.<br/><br/>The fire is thought to have started when a fridge exploded in a kitchen on the fourth floor.