Miami building collapse: one dead as rescue crews say 99 unaccounted for

• Officials say about 55 of building's 130 apartments affected
• Reason for collapse in Surfside not yet known - authorities

A large-scale rescue operation was continuing Thursday evening at the site of a collapsed condominium block in Miami, where authorities said at least one person was killed, 10 injured and dozens more unaccounted for.

Crews reported hearing noises from inside the rubble as they searched for survivors at the Champlain Towers South condo in Surfside, a 12-storey apartment block that came crashing down at about 1.30am. Authorities said they expected the number of deaths to rise, but would not be drawn on the number.