Kenyan presidency says one mall gunman arrested

Kenyan police officers take position outside the Westgate shopping mall as a hostage situation continues in Nairobi, Kenya, September 21, 2013. (EPA/DAI KUROKAWA)

NAIROBI (Reuters) - Kenyan security forces have arrested one of the gunmen who attacked a shopping mall in the capital, killing at least 25 people, on Saturday, the Kenyan Presidency said on Twitter. In a separate tweet, the east African country's head of police, David Kimaiyo, said several other assailants had been pinned down after soldiers and police moved into the mall to hunt down the attackers. (Reporting by Humphrey Malalo; Writing by Richard Lough; Editing by Kevin Liffey)