NY terrorist attack stats emerge amid SA warning

On Tuesday the US embassy warned Americans in South Africa about a possible terrorist attack.

FILE: A man walks among the rubble at the site of the World Trade Centre shortly after the 9/11 attack. Picture: AFP.

JOHANNESBURG - As the US embassy warns Americans in South Africa about a possible terrorist attack, New York's police chief says more than 20 terror plots have been foiled in the city since the September 11 attacks in 2001.

Bill Bratton also says the risk of another devastating attack remains.

On Friday, New York will mark the 14th anniversary of the 9/11 attacks which levelled the Twin Towers of the World Trade Center, claiming nearly 3,000 lives.

Meanwhile, the US State Department says it cannot divulge any further details about yesterday's terror alert from its embassy in Pretoria.

Spokesperson John Kirby says this is an intelligence matter.

"There was information indicating potential harm here. From terrorists' activities they did the right thing, they put the warning out and we're going to continue to monitor things. But I'm not going to talk about the details of it."

At the same time, state security minister David Mahlobo says there is no immediate danger or threat to any South Africans.

He says they have done their own assessment and no imminent attacks are possible.

LISTEN: Kieno Kammies speaks to defence analyst Helmut Heitman, State Security Agency spokesperson Brian Dube and Martin Ewi from the Institute for Security Studies for their take on the issue.