clipped from: www.dailymail.co.uk   
Zimbabwean police stopped a convoy of ambassadors investigating attacks on opposition supporters today and an officer threateningly drove his car toward the U.S. ambassador during the standoff.

A UN official, meanwhile, warned that post-election violence could reach crisis levels.

Mugabe

The group included U.S. Ambassador James McGee and the British envoy.

Police demanded the diplomats prove they had official permission for a visit to hospitals and an alleged torture camp they had just completed.

Mr McGee insisted the convoy be allowed through and the 11 vehicles passed through after about an hour. A police car escorted them back to the U.S. Embassy before disappearing.

The incident reached its high point when a police officer threatened to beat one of McGee's senior aides.

The officer got into his car and lurched toward McGee after he had demanded the officer's name. The car made contact with McGee's shins, but he was not injured.