Westgate: Search for clues in rubble after Nairobi attack

Kenyan teams investigating a bloody siege by Islamist militants in Nairobi have been joined by experts from the US, UK, Germany, Canada and Interpol.

Forensic experts are combing the Westgate shopping complex for DNA and ballistic clues, Interior Minister Joseph Ole Lenku said.

Meanwhile, the county has begun three days of national mourning following attack, which left at least 67 civilians and several members of the security forces dead.

Andrew Harding reports.