根据以下输入生成一篇新闻报道。


今天早上，发生了一场重大的交通事故，造成了许多车辆的交通拥堵和许多人员受伤。事故发生在上午7点左右，涉及一辆载有五人的小型客车和一辆大卡车。还没有确定发生这起事故的原因。
Today morning a major traffic accident occurred causing a lot of traffic congestion and many injuries. The accident occurred around 7 am and involved a small van carrying five people and a large truck. The cause of the accident is yet to be determined.