Medellin tower blocks demolished in Colombia
Engineers in the Colombian city of Medellin have blown up four tower blocks at the Space apartment complex, which were deemed unsafe following a deadly collapse.
Twelve people died last October when a concrete pillar gave way in Tower 6 at the development, causing the 24-storey building to topple.
Tower 5 was blown up in February.
Two hundred kilos (440lb) of explosives were used in the demolition, which happened on Tuesday.