LONDON - London police on Saturday raised to 58 the number of deaths either confirmed or presumed following the horrific inferno that turned the city's Grenfell Tower public housing block into a charred hulk.

Public anger is mounting as residents and neighbors demand answers for how the blaze early Wednesday spread so quickly and trapped so many of the tower's 600-odd residents. British media have reported that contractors installed a cheaper, less flame-resistant type of exterior paneling on the 24-story tower in a renovation that was completed just last year.

Police Commander Stuart Cundy said the number 58 is based on reports from the public and may rise. It includes 30 deaths that already have been confirmed, and reports of people who are missing and presumed to have been killed. He says it will take weeks or longer to recover and identify all the dead at the building.