A bus carrying the sister of the Rev. Martin Luther King Jr. and other relatives slammed on the brakes in an effort to avoid a collision with a minivan after leaving the 50th anniversary of the March on Washington, authorities said.

U.S. Park Police responded to 15th Street and Independence Avenue SW about 5:30 p.m., said Sgt. Paul Brooks, a Park Police spokesman. No injuries were reported, Brooks added.

Christine King Farris, her children and grandchildren were among those on the bus, said Omarosa Manigault, a reality-TV personality, who also was in the vehicle.