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Some of the most iconic buildings in Karachi, Pakistan, are at risk as the mega-city's population booms around them.

Safeguarding old buildings, many considered landmarks and dating back to the colonial era, has not been a top priority for city planners.

Even so, a small and determined group of people is trying to save the city's architectural heritage

Al Jazeera's Imtiaz Tyab reports from Karachi.

Source: Al Jazeera