The centenary celebration committee of Dennis Memorial Grammar School, Onitsha, popularly known as DMGS, has stated that the cause of the collapse of its five-story building is yet to be ascertained. A five-story structure being built for the celebration of the 100 years of existence of the school collapsed a few days ago, trapping some workers. The school is owned by the Diocese on the Niger, Anglican Communion. In a press release by the Director of Operations of the centenary celebration, Dr. Chijioke Ojji, the school said two persons were rescued alive from the rubble, but one person was de…