Polls close in the Corby by-election, while voting ends in two other Westminster seats and for police and crime commissioners in England and Wales.

The CIA opens an investigation into the conduct of its former director, David Petraeus, who resigned last week because of an extramarital affair.

US President Barack Obama consoles bereaved residents in areas of New York that still have no electricity 17 days after the deadly super-storm Sandy.

Experts warn more research is needed to find out how to reduce the number of babies born early.

Tory peer Lord McAlpine said it was "terrifying" to find himself "a figure of public hatred" after he was wrongly implicated in child abuse allegations.

Baby tortoises have been given paternity tests to find out how sperm storage affects fertilisation.

Counting is due to start after polls for the first police and crime commissioners in England and Wales, along with a Westminster by-election in Corby.

Egypt's prime minister says Israeli attacks on Gaza are a disaster and must stop, shortly after he arrived in Gaza to offer support to Palestinians.