DOHA (AFP) - UN talks on slowing the pace of destructive global warming ran deep into extra time on Saturday as host Qatar sought to break a days-old deadlock between rich and poor nations. A stock-take meeting called for 10:00 am had not taken place nearly five hours later, with urgent huddles under way in corridors and meeting rooms to find consensus on technicalities standing in the way of a Doha deal. The conference was scheduled to have closed on Friday. Delegates must sign off on a new term for the greenhouse-gas curbing Kyoto Protocol as an interim measure to rein in climate change pending a new pact due to take effect in 2020.