The woman in the carjacking attempt was taken to a hospital.
Leaders of local, state and federal law enforcement agencies announced that a task force assembled to attack the carjacking problem had significantly reduced the number of such thefts.
The man, Casey W. Till, 26, of Haines City, faces murder and carjacking charges after the attacks on Sunday on family members traveling in two vehicles.
Dzhokhar Tsarnaev also faces charges for a carjacking days after the attacks and for interfering with commerce, prosecutors said.
The State Department Web site warned travelers to Kenya that "violent criminal attacks, including armed carjacking and home invasions/burglary, can occur at any time and in any location, and are becoming increasingly frequent, brazen, vicious and often fatal".
Both Tongo and Qwabe have said Dewani wanted it to look as if he was not involved his wife's murder and they planned to have the attack look like a carjacking in Cape Town's impoverished Gugulethu township.
The latest evacuation comes just days after Aurukun school principal Scott Fatnowna was attacked and carjacked for a second time in two weeks.
During this time in August 2003 Beharall was a victim of a carjacking when he and team mate Adam Griffin were attacked when they stopped at a cash machine with Beharall leaving Grffin in the passenger seat and his £21,000 Mercedes-Benz R230 car parked at a Texaco garage in Oldham.
Ms. Kayumba said she believed President Kagame was behind the attack, and ruled out an attempted robbery or carjacking because the gunman shot only her husband and did not try to steal the car.
Since the end of major combat on May 1, American forces have been fighting not only a shadowy insurgency that carries out hit-and-run strikes with rockets and remote-controlled roadside bombs, but also criminal operations -- counterfeiting, prostitution, carjacking gangs and kidnapping -- that officers here say are helping finance the attacks.
