British authorities on alert after two terror incidents

LONDON, England -- The Olympics are just two weeks away and two separate incidents have British authorities taking precaution.

A bus on its way to London was pulled over by police after a passenger poured a liquid into a smoking bag.  Police isolated the passengers on the side of the road.

"We heard it was a device, could be an explosive on the bus, suddenly 30 other vehicles arrives. It was quite serious," one bus passenger said.

The military was also called in.

While that incident was a false alarm, an incident near Olympic Park ended with the arrest of six people.

Police say it was some sort of "pre-planned" operation.