An update from the CNN newsdesk in London on stories we're following on Wednesday:

Helping Pakistan: More than 1,300 people are believed dead after the flooding in Pakistan as the nation's military and emergency services struggle to cope with the flood waters. The U.N. has said aid operations massively need to be scaled up and will launch an initial emergency response plan Wednesday.

Rwanda results expected: The confirmed results of Rwanda’s elections are due to be announced. It is expected that the incumbent president Paul Kagame will win a second and final term.

Campbell statement on war crimes trial: Supermodel Naomi Campbell has defended her testimony at the war crimes trial of former Liberian President Charles Taylor, saying Wednesday she had no motive and "nothing to gain." Campbell testified last week at the Special Court for Sierra Leone at The Hague, Netherlands, regarding a pouch of diamonds she received in 1997.

Is Russian smog radioactive? Authorities fear that wildfires in Russian regions impacted by the Chernobyl nuclear disaster could blow radioactive smoke across the countryside and even Moscow. Officials say, however, that incidents of wildfires are lessening.

Asian superbug fears: The new NDM1 superbug has caused alarm in the UK after 37 cases have already were reported. Experts say the superbug, which is resistant to most forms of antibiotics, seems to have reached the UK via patients who travelled to Asia for treatment or surgical procedures.

Politicians want Al-Megrahi medical records: U.S. senators investigating the circumstances surrounding the release of convicted Lockerbie bomber Al Megrahi have requested full medical records from the Scottish government.

Ramadan begins: Millions of Muslims around the world have begun their annual observance, which lasts till early September.

This old house: Experts in Yorkshire, northern England, believe they have found the country’s oldest abode, estimated to be 10,500 years old.