Mega-prison in El Salvador where 40,000 suspected gangsters crammed in side by side

In the prison, which has been named the "centre for terrorists", convicts don't even get a mattress to lay on and 20 per cent won't get a bed at all.

The first 2,000 inmates are just the tip of the iceberg. The high-tech jail in gang-infested Tecoluca can house a whopping 40,000 prisoners.