Attempts to rescue 10 men from a flooded mine in Mexico have been delayed after the water levels in three shafts rose suddenly on Sunday. The miners became trapped on 3 August when a wall in a tunnel collapsed and water from an adjacent chamber gushed into the three shafts.
Officials say the water has to drop to a depth of 1.5m (5ft) to allow rescuers to enter the shafts safely. But on Sunday, it suddenly rose again to more than 20m.