The body of an eighth victim has been found in the wreckage of Tuesday's train derailment in Philadelphia, the city's fire commissioner said.
A cadaver dog found the body in the wreckage of the Amtrack train's first carriage.
Philadelphia mayor Michael Nutter said all 243 people who were on the train have been accounted for.
Investigators have revealed that the engineer of the train was travelling at 160km/h, which is twice the approved speed.
Preliminary data from the so-called "black box" recovered from the wreckage of Amtrak Train 188, showed that the engineer hit the emergency brakes just before the derailment.
The train was en route from Washington to New York when the derailment occurred.
Investigators are waiting to interview the engineer - identified as Brandon Bostian - about the crash, which he told his attorney he did not remember.
One carriage of the seven carriage train flipped over in the derailment and three others were thrown on their sides.
About 200 people were injured.
Mr Nutter said officials were not releasing information about the eight people who died.
The discovery of the eighth victim was announced by Fire Commissioner Derrick Sawyer.
Federal investigators were studying video taken from the train, testing brake systems and using three-dimensional imaging of two derailed carriages in an effort to establish the cause of the derailment.
Elsewhere, the US President Barack Obama has said that the United States needs to invest in infrastructure.
