 and one of its officers was killed. Police haven't commented on any motive. The state-run news agency is saying three attackers were killed. The U.S. Embassy has warned its citizens to stay away from the area. I'm Charles de la Desma. Another 200 police officers from Kenya arrived in Haiti for a U.N.-backed mission led by the East African country to battle violent gangs that have taken over parts of the troubled Caribbean country.