Saad El-Katatni, head of the Freedom and Justice Party and former speaker of parliament, has extended his condolences to the families of 19 soldiers who died in a train accident in Giza on Monday.
El-Katatni said recurrent train accidents were proof of the almost total collapse of infrastructure caused by corruption during the Mubarak years.
The accident was a signal for everyone to end political conflicts and cooperate to rebuild the country, he added.
"We cannot waste time. The Egyptian people are in need of work and accomplishments, and we cannot spend time with arguments and conflicts."
On Monday night, 19 Central Security Forces conscripts were killed and 120 injured when a train carriage derailed in Badrashin in Giza, the transport ministry said.
The 12-carriage train, which was carrying 1328 conscripts, was en route to Cairo from Upper Egypt when one of its cars - carrying around 200 soldiers - derailed, hitting a goods train parked outside a storage depot.