US official: Violence in Haiti hindering aid work

Some incidents of violence in Haiti have hinderedrescue workers trying to help earthquake victims, a top officialleading the US government's relief efforts said Sunday.

Providinghumanitarian aid requires a safe and secure environment, said Lt. Gen.Ken Keen of the US Southern Command. While streets have been largelycalm, he said, violence has been increasing.

"We are going to have to address the situation of security,"Keen said. "We've had incidents of violence that impede our ability tosupport the government of Haiti and answer the challenges that thiscountry faces."

Keen said about 1,000 US troops are in Haiti and that 3,000more are working from ships. More than 12,000 US forces are expected tobe in the region by Monday.